A.03.09 Amendment Package 0003 Specifications and Drawings.pdf

Phase II Redevelopment Site - Martin, KY Amendment No. 0 003

RTA SOLICITATION NO.: W9123720B0002

SECTION TABLE OF CONTENTS

DIVISION 13 - SPECIAL CONSTRUCTION

SECTION 13 80 00

GEOTECHNICAL INSTRUMENTATION

PART 1 GENERAL

1.1 SCOPE

1.2 REFERENCES

1.3 QUALIFICATIONS OF CONTRACTOR'S INSTRUMENTATION PERSONNEL

1.4 PURPOSE OF GEOTECHNICAL INSTRUMENTATION PROGRAM

1.5 RESPONSIBILITIES OF CONTRACTOR

1.6 SUBMITTALS

1.7 SCHEDULING WORK

1.8 SHIPMENT AND STORAGE

PART 2 PRODUCTS

2.1 MATERIALS

2.2 VIBRATING WIRE PIEZOMETERS

2.3 SURVEYING INSTRUMENTS FOR SETTLEMENT PLATFORM

2.4 SETTLEMENT PLATES

2.5 MAGNET EXTENSOMETERS

2.6 INCLINOMETERS

2.7 STRUCTURAL MONITORING POINTS

2.8 FACTORY CALIBRATION

PART 3 EXECUTION

3.1 PREINSTALLATION ACCEPTANCE TESTS

3.2 INSTALLATION - GENERAL

3.3 INSTALLATION OF VIBRATING WIRE PIEZOMETERS

3.4 INSTALLATION OF SETTLEMENT PLATES

3.5 INSTALLATION OF MAGNET EXTENSOMETERS

3.6 INSTALLATION OF INCLINOMETERS

3.7 STRUCTURAL MONITORING POINTS

3.8 FIELD CALIBRATION AND MAINTENANCE

3.9 DAMAGE TO INSTRUMENTATION

3.10 MONITORING OF INSTRUMENTATION AFTER INSTALLATION

3.11 DISCLOSURE OF DATA

3.12 DISPOSITION OF INSTRUMENTS

3.13 MEASUREMENT AND PAYMENT

3.13.1 Measurement

3.13.2 Base Contract Payment

3.13.3 Option One Payment

3.13.4 Option Two Payment

3.13.5 Option Three Payment

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Enclosure No. SECTION 13 80 00 Page 1

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Phase II Redevelopment Site - Martin, KY Amendment No. 0003

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Enclosure No. SECTION 13 80 00 Page 2 brian.polak

SECTION 13 80 00

GEOTECHNICAL INSTRUMENTATION

PART 1 GENERAL

1.1 SCOPE

The Contractor shall furnish, install, and maintain geotechnical instrumentation; protect instrumentation from damage.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A 53 (2018) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM C 778 (2017) Standard Specification for Standard Sand

1.3 QUALIFICATIONS OF CONTRACTOR'S INSTRUMENTATION PERSONNEL

Geotechnical instrumentation work involves highly specialized tasks. The Contractor's instrumentation personnel who are responsible for furnishing and installing all geotechnical instrumentation and maintaining instrumentation, as required, shall provide Contractor's Personnel resumes showing the qualifications specified herein. These personnel may be on the staff of the Contractor or may be on the staff of a specialist instrumentation subcontractor.

(a) The Contractor's instrumentation personnel shall include a qualified Geotechnical Instrumentation Engineer who is a registered Professional Engineer in the State of Kentucky, who has a minimum of a Bachelor of Science degree in civil engineering, and who has at least 4 years of experience in installation of the types of instruments specified herein. The Geotechnical Instrumentation Engineer shall:

(1) Prepare detailed step-by-step Work Plan describing the installation procedures to be used for all instruments specified herein.

(2) Be on site and supervise at least the first two installations of each type of instrument.

(3) Conduct the pre-installation and post-installation acceptance tests for at least the first two of each type of instrument specified herein.

(4) Be on-site until the completion and acceptance tests for at least the first two of each type of instrument specified herein.

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(b) The Contractor's instrumentation personnel shall include a Superintendent who will be in responsible charge full-time on site during the geotechnical instrumentation program. The Superintendent shall have at least 4 years of direct field experience in installation of the types of instrumentation specified herein, and shall have supervised instrumentation programs of similar magnitude in similar subsurface conditions. The Superintendent shall:

(1) Be on-site and supervise all instrument installations, and pre-installation and post-installation acceptance tests, after the Geotechnical Instrumentation Engineer has performed these three tasks for the first two of each instrument type.

(c) The Contractor's instrumentation personnel including the Geotechnical Instrumentation Engineer, and the Superintendent, shall be submitted to the COR for approval. If requested by the COR, the Contractor shall replace any person in the position of Geotechnical Instrumentation Engineer or Instrumentation Superintendent who fails to properly perform their required tasks as defined herein.

1.4 PURPOSE OF GEOTECHNICAL INSTRUMENTATION PROGRAM

Purposes of the Geotechnical Instrumentation Program include, but are not limited to:

(a) Providing pre-construction baseline data for comparison with construction and post-construction data.

(b) Monitoring of ground retaining walls, and pore-pressure during and after construction. Monitoring to be performed by the Contractor.

(c) Providing a warning of unforeseen conditions that may require remedial or precautionary measures.

(d) Providing data (monitoring) to determine when sufficient consolidation of the foundation has occurred to permit additional fill to be placed. Monitoring to be performed by the Contractor for the length of the contract.

1.5 RESPONSIBILITIES OF CONTRACTOR

(a) Furnish all components of geotechnical instrumentation required by the Contract.

(b) Furnish portable readout units for the COR's use.

(c) Install instruments specified in the Contract.

(d) Protect from damage and maintain instruments installed by the Contractor. Repair or replace damaged or inoperative instruments throughout the duration of the Contract.

(e) Provide data collection (monitoring) and inspection of the instrumentation.

(f) Provide monthly instrumentation reports with plots of instrument readings during the duration of the construction.

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1.6 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Contractor's Personnel Resumes ; G, AE

Within 10 calendar days after Notice to Proceed, submit to the COR for review:

(a) Resumes of Geotechnical Instrumentation Engineer and Superintendent sufficient to define details of relevant site experience.

(b) Resumes of other field and office geotechnical instrumentation personnel to be assigned to the project, other than clerical staff.

(c) Proposed equipment and products for all instrumentation.

Name, make, product name , manufacturer's specifications, and details of installation.

SD-03 Product Data

Factory/Manufacturer Information ; G, AE

Within 7 calendar days of receipt of each instrument at the site, submit to the COR a copy of factory calibration, manufacturer's calibration and test equipment certification, completed copy of quality assurance checklist, and warranty for each portable readout unit.

SD-05 Design Data

Contractor Installation Plan ; G, AE

At least 15 calendar days prior to commencing installation of the first of each type of instrument, submit to the COR for review the following items pertaining to that instrument type:

(a) Detailed step-by-step procedure for installation, together with a sample installation record sheet. The procedures shall be bound and indexed. The installation procedures shall include:

(1) The method to be used for cleaning the inside of casing or augers.

(2) Specifications for proposed grout mixes, including commercial names, proportions of admixtures and water, mixing sequence, mixing methods and duration, pumping methods and tremie pipe type, size and quantity.

(3) Drill casing or auger type and size.

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(4) Depth increments for backfilling boreholes with sand and granular bentonite.

(5) For magnetic extensometer with spider magnets, method for actuating leaf springs, method for creating a reproducible reading to verify that leaf springs have been actuated, method for ensuring that magnets remain at the specified locations during installation and spring actuation, and method for ensuring that all leaf spring actuation devices can be retrieved.

(6) Method for overcoming buoyancy of instrumentation components during grouting.

(7) Method of sealing joints in pipes and inclinometer casing to prevent ingress of grout.

(8) Method of conducting pre-installation and post-installation acceptance test.

(9) Method for protecting instruments from damage.

(10) Methods to all for compression of instruments due to consolidation of the foundation without damaging the instrument.

(b) Sample of the quality assurance checklist, pre-installation acceptance test record, installation record for each instrument type to be used to check instruments on receipt from the manufacturer.

SD-06 Test Reports

Instrumentation Testing

Within 7 calendar days of receipt of each instrument at the site, submit to the COR completed pre-installation acceptance test record form for that instrument.

Within 5 calendar days of installing each instrument, submit to the COR the installation record sheet for that instrument, including as-built instrument location as specified.

Within 5 calendar days of installation, submit to the COR the sand to be utilized in the placement of the instrumentation.

Submit monthly reports with instrumentation readings and plots indicating total movements to date and movements from the last reading during the duration of construction.

SD-07 Certificates

Instrumentation Calibration

A factory calibration shall be conducted on all instruments prior to shipment to the Site. Certification shall be provided to indicate that the test equipment used for this purpose is calibrated and maintained in accordance with the test equipment manufacturer's calibration requirements and that, where applicable, calibrations are traceable to the National Institute of Standards and Technology.

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SD-11 Closeout Submittals

As-Built Plans ; G, AE

The Contractor shall submit to the COR updated as-built instrument location plans within one week of the completion of installation of each instrument.

1.7 SCHEDULING WORK

Install instruments and agree on formal initial readings and the following schedule:

(a) Vibrating wire piezometers shall be installed and formal initial readings recorded.

(b) Inclinometers and magnet extensometers shall be installed and formal initial readings recorded.

(c) Settlement platforms and structural monitoring points shall be installed and formal initial readings recorded.

(d) Variations in this schedule require the prior review and acceptance by the COR.

1.8 SHIPMENT AND STORAGE

All instrumentation materials, after receipt at the site and prior to installation, shall be stored in an indoor, clean, dry, and secure storage space. Instruments shall not be exposed to temperatures outside the manufacturer's stated working temperature range, nor should they be allowed to freeze. Shelby tubes shall be protected at the site until turned over to the Government.

PART 2 PRODUCTS

2.1 MATERIALS

(a) All materials shall be new.

(b) Specified readout units, together with associated calibration devices and software, shall be furnished to the COR no later than 7 calendar days before commencing installation of the first of each type of instrument. In addition to specified readout units for the COR's use when collecting data, the Contractor shall provide Contractor's own readout units as needed for making pre-installation and post-installation acceptance tests, for taking any required readings during installation, and for taking additional readings required by the Contractor during the course of the Work. Such readout units shall be identical to the specified readout units.

(c) The Contractor shall furnish all installation tools, materials, and miscellaneous instrumentation components necessary to install the required instrumentation in a fully functional state.

(d) The Contractor shall provide surface protection to each instrument to protect the instrument from damage by the elements, vandals and the Work activities. The Contractor shall submit proposed protection methods and measures to be used for review and acceptance

Enclosure No. SECTION 13 80 00 Page 7 brian.polak by the COR at least 10 calendar days prior to the start of installation. The Contractor shall maintain and repair all surface protection measures for the duration of the Contract.

(e) For each instrument type, provide an instruction manual which shall include the following:

(1) A description of the purpose of the instrument.

(2) Theory of operation.

(3) Step-by-step procedures for:

(a) Pre-installation acceptance test when instruments are received on site, to ensure the instruments are functioning correctly prior to installation.

(b) Calibration of readout units.

(4) A list of calibration equipment required, and recommended frequency of calibration.

(5) Step-by-step instrument installation procedure including materials, tools, spare parts, and any borehole requirements, and post-installation acceptance tests.

(6) Maintenance procedure.

(7) Step-by-step data collection procedure.

(8) Data reduction, processing, and plotting procedures.

(9) Factory/Manufacturer Information.

(f) All measurements, dimensions and units shall be in U.S.

Customary Units, for example, feet, inches, pounds.

2.2 VIBRATING WIRE PIEZOMETERS

(a) Piezometers shall have a range of 50 psi , an over-range rating of twice the rated pressure, ± 0.2 percent full scale accuracy, and

0.025 percent full scale resolution, and shall be fitted with a low air entry filter. Piezometers shall include a temperature sensor.

(b) Provide cable. Cable shall be from the same commercial source as the piezometers, and shall either be 4-conductor, 22-gage, with two shielded twisted pairs, a common drain wire, and a sheath of 0.065 inch thick pressure-extruded vinyl with an outside diameter of 0.25 inch .

Cable shall be attached to the piezometers through an integral bulkhead seal, consisting of an interior waterstop seal and a cable entry seal. Seals shall be either 0-rings or hermetic seals. The seals shall have been tested and certified for water tightness over the specified pressure range of piezometers.

(c) Provide readout and other terminal units, from the same commercial source as the piezometers. The readout unit shall be capable of reading both the vibrating wire and temperature sensor, shall have a minimum of 64k RAM memory, and shall display readings in engineering units.

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(d) Filter sand shall conform to ASTM C 778 or 20-40 sand.

(e) Granular bentonite shall be designed for use as sealants for hole abandonment, casing seals, or any vertical seal to prevent water movement up or down a bore hole. When absorbing water, granular bentonite shall swell to fill voids, exerting pressure against all surfaces to create a flexible low permeability seal. Granular bentonite sizing shall be up to 0.25 inch and have a permeability of 1 x 10^-9 cm per second.

(f) Special grout Type A shall consist of uniform sized fine ground or powdered non-drilling mud grade bentonite, for use in sealing and grouting well casings. A polymer-based thixotropic additive may also be added to the mix if recommended by the manufacturer. Special grout Type A shall have a mixed specific gravity, prior to placement within the instrument borehole, of between 1.03 and 1.20. The cement-bentonite grout mix shall consist of one 94-lb bag of Portland cement, Type III, mixed with 60 to 75 gallons of water. Powdered bentonite up to 40 lbs will be added to cement-water mix to produce a pumpable grout of thick creamy consistency.

(g) Cylindrical sounding hammer shall be a steel cylinder with outside diameter 0.3 to 0.5 inch less than the inside diameter of the casing or augers, an inside diameter 0.15 to 0.25 inch larger than the outside diameter of the cable, a length of not less than 2 feet , and a weight of 10 to 20 pounds .

2.3 SURVEYING INSTRUMENTS FOR SETTLEMENT PLATFORM

(a) Instruments used for vertical deformation monitoring shall have a minimum accuracy of ±1.5 mm (standard deviation for one kilometer of double run leveling) and a minimum setting accuracy of ±1.0 arc seconds. Leveling staffs shall be non-telescopic in design (i.e., `Chicago' style leveling staff). A bull's eye bubble shall be used to plumb the leveling rod.

(b) Contractor shall establish one benchmark s for every the instrument pod noted on the project drawings. The benchmark s shall be located outside the work area in solid ground or bedrock of the new levee and stability berm embankment and founded at an elevation of -60 feet MSL. These benchmarks shall be grouted Schedule 40 PVC pipe, at least 3 inches in diameter. The elevations of the top of benchmark shall be established by the Contractor and provided to the COR.

2.4 SETTLEMENT PLATES

Contractor shall provide settlement plates in accordance with details shown on the contract drawings. Settlement plates are to be installed at the top of the select sand layer. Provide 2-inch and 4-inch standard steel pipe, threaded and coupled, ASTM A 53 , Grade B, in 4-foot lengths.

2.5 MAGNET EXTENSOMETERS

(a) Provide magnetic extensometer system with readouts.

(b) Access tube shall be ABS pipe, 2.75-inch nominal diameter.

(c) Telescoping joints shall be provided at all connections in the

Enclosure No. SECTION 13 80 00 Page 9 brian.polak access tube to allow for vertical compression.

(d) Magnetic settlement targets shall be pneumatically or mechanically actuated spider magnets, with 6 leaf springs, suitable for installation in a 6-inch diameter borehole. The stiffness of the leaf springs shall be such that a force of at least 5 pounds is required to move an 8-inch long leaf spring from its extended position to the longitudinal axis of the target. The extended diameter of the leaf springs shall be at least 9 inches . Two datum ring magnets shall be provided for each installation. The profiles of the spider magnet bodies and actuation devices shall be tapered such that there is no possibility of actuation devices hanging up on magnet bodies during retrieval. The actuation devices shall be designed such that there is a clear and reproducible signature to verify that the leaf springs have been released. If pneumatically actuated cutters are used, the connection between the cutter and pneumatic tubing shall sustain a tensile force of not less than 45 pounds .

(e) Reed switch probe and reel shall have 100 feet of nylon-coated tape with integral conductors. Tape shall be graduated in feet, tenths, and hundredths of a foot.

(f) Cement grout shall be Type III Portland cement and water.

(g) Special grout Type A shall consist of uniform sized fine ground or powdered non-drilling mud grade bentonite, for use in sealing and grouting well casings. A polymer-based thixotropic additive may also be added to the mix if recommended by the manufacturer. Special grout Type A shall have a mixed gravity, prior to placement within the instrument borehole, of between 1.03 and 1.10. The cement-bentonite grout mix shall consist of one 94-lb bag of Portland cement, Type III, mixed with 60 to 75 gallons of water. Powdered bentonite up to 40 lbs will be added to cement-water mix to produce a pumpable grout of thick creamy consistency.

2.6 INCLINOMETERS

(a) Provide inclinometer casing, probe, cable, readout unit, and accessories.

(b) Inclinometer casing shall be 3.34-inch O.D. with broached internal keyways, and twist tolerance better than one degree per 10-foot length. Couplings shall be of the telescoping type to permit the casing to adjust to compression of the foundation.

(c) Probe shall be biaxial, consisting of two force balance accelerometers mounted at 90 degrees , with a 2-foot wheelbase. Probe shall be supplied in a carrying case.

(d) Cable shall be 100 feet long, shall be sheathed with neoprene, and shall have vulcanized rubber markers, and an internal wire rope core. Minimum cable O.D. shall be 0.4-inch .

(e) Readout unit: The readout time interval between recordings 2 feet apart in the casing shall be such that the reading stabilizes to within ±1 unit of display within 8 seconds. Readout unit shall include a battery charger.

(f) Provide accessories, consisting of end caps, tools, and

Enclosure No. SECTION 13 80 00 Page 10 brian.polak materials for attaching couplings and taking readings.

(g) Cement grout shall be Type III Portland cement and water.

Special grout, Type B shall include cement, bentonite, and water, and shall have approximately the same shear strength and compressibility as the surrounding ground. The cement-bentonite grout mix shall consist of one 94-lb bag of Portland cement, Type III, mixed with 60 to 75 gallons of water. Powdered bentonite up to 40 lbs will be added to cement-water mix to produce a pumpable grout of thick creamy consistency.

(h) Surface protection shall be 6-inch diameter steel casing at least 6 feet in length with locking cap. This will allow attachment of cable support assembly, or shall allow for an inclinometer casing extension while readings are being taken. The length of the inclinometer casing shall not vary by more than 0.05 inches between sets of readings.

2.7 STRUCTURAL MONITORING POINTS

Structural monitoring points shall consist of "tell-tails" that shall be welded or epoxied to the tops of steel H-piles.

2.8 FACTORY CALIBRATION

(a) A factory instrumentation calibration shall be conducted on all instruments at the place of manufacture prior to shipment. Each factory calibration shall include a calibration curve with data points clearly indicated, and a tabulation of the data. Each instrument shall be marked with a unique identification number. Quality assurance as factory calibration shall be performed as specified herein previously.

The instrumentation calibration shall be submitted to the Contracting Officer.

(b) Factory calibrations of vibrating wire piezometers shall be made against a pressure gage traceable to the National Institute of Standards and Technology. The accuracy of the pressure gage shall not be less than twice the specified accuracy of the piezometers.

Calibrations shall be made to full scale in two complete cycles, recording the reading in 10 equal increments during two loading and two unloading cycles. The thermal factor of each piezometer shall be determined in a precision test chamber, at 0, 10, 20, and 30 degrees C .

The calibration record shall include gage factor, thermal factor, and zero reading with corresponding temperature and barometric pressure.

(c) Factory calibrations of magnetic extensometers shall be made by verifying that an audible signal is emitted as the probes pass through each magnet. Each magnet shall be supplied with a label or sticker confirming that it has been checked as specified. The tape attached to the probe shall be checked against a standard traceable to the National Institute of Standards and Technology, to an accuracy of ± 0.05-inch .

(d) Factory calibrations of inclinometers shall include comprehensive calibrations of the force balance accelerometers prior to assembly in the probe. A final calibration shall include measurements made at 10 degrees intervals from -30 degrees to +30 degrees with respect to vertical, and a comprehensive repeatability check over +1-5 degrees of vertical.

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PART 3 EXECUTION

3.1 PREINSTALLATION ACCEPTANCE TESTS

(a) When instruments are received at the site, the Contractor's instrumentation personnel shall perform instrumentation testing to ensure that the instruments and readout units are functioning correctly prior to installation. Pre-installation acceptance tests shall include relevant items from the following list:

(1) Examine factory calibration curve and tabulated data, to verify completeness.

(2) Examine manufacturer's final quality assurance inspection check list, to verify completeness.

(3) Check cable length.

(4) Check tag numbers on instrument and cable.

(5) Check, by comparing with procurement document, that model, dimensions, and materials are correct.

(6) Bend cable back and forth, at point of connection to instrument, while reading the instrument, to verify connection integrity.

(7) Perform resistance and insulation testing, in accordance with criteria provided by the instrument manufacturer, using a gage insulation or circuit tester that applies 2 volts or less for resistance testing and 15 volts or less for insulation testing.

(8) Verify that all components fit together in the correct configuration.

(9) Check all components for signs of damage in transit.

(10) Check that quantities received correspond to quantities ordered.

(b) During pre-installation acceptance testing of each instrument, the Contractor's instrumentation personnel shall complete a pre-installation acceptance test record form.

(c) An instrument that fails the specified pre-installation acceptance test shall be repaired such that it passes a subsequent pre-installation acceptance test, or shall be replaced by an identical instrument at no additional cost to the Government.

3.2 INSTALLATION - GENERAL

(a) The Contractor shall provide Contractor's personnel resumes for instrumentation personnel who shall install instruments in accordance with the Contractor's detailed step-by-step procedures that were submitted as the Contractor Installation Plan and reviewed by the COR.

(b) The Contractor shall submit a Contractor Installation Plan for each instrument to be installed. Installation procedures for

Enclosure No. SECTION 13 80 00 Page 12 brian.polak instruments in boreholes shall be such that all steps in the procedure can be verified . Granular bentonite shall be placed in depth increments not exceeding 2 feet . Volumes of each increment of backfilling with sand shall be small enough that no bridging of bentonite occurs. The depth to the top of each instrument of sand or granular bentonite shall be checked after placement.

(c) Grout shall be placed using a tremie method with side discharge ports on the tremie pipe.

(d) Prior to installing any instrument through drill casing or augers, all material adhering to the inside of the casing or augers, and all cuttings, shall be removed thoroughly.

(e) Whenever withdrawing drill casing or augers during instrument installation in a borehole, care shall be taken to minimize the length of unsupported borehole and the rate of casing or auger withdrawal.

Collapse of the borehole shall not be allowed to occur. Backfill material shall not be allowed to build up inside the casing or auger such that the instrument is lifted as the casing or auger is withdrawn. The casing or auger shall be withdrawn without rotation.

The casing or auger may be omitted, if allowed by the COR, only where it can be shown that instrument installation without the casing or auger will not cause collapse of the borehole or in any way adversely affect instrument installation. If casing or augers are omitted, or the COR allows withdrawal of casing or augers prior to instrument installation, the following requirements shall apply. The instrument shall be installed in the borehole in a continuous operation, starting when instrumentation materials are first placed in the borehole, and shall not be interrupted prior to complete backfilling of the borehole to the ground surface. Partially completed instrument installations shall not be left in unsupported boreholes overnight or longer without the prior written concurrence of the COR.

(f) The Contractor shall notify the COR at least 24 hours prior to installing each instrument.

(g) The Contractor shall install instrumentation, in addition to that specified herein, that the Contractor deems necessary to ensure the safety of personnel and the Work, at no additional cost to the Government. The Contractor shall notify the COR at least 24 hours prior to installing any such additional instrumentation. Data resulting from such instrumentation are referred to herein as Contractor's data. Such Contractor's data will be accepted by the COR only if the data are obtained from instrumentation furnished, calibrated, tested, installed, and maintained as specified herein, if the data are collected and plotted as specified herein, and if submitted to the COR within one month of data collection.

(h) The Contractor shall extend installed instrumentation and reinstall protection measures as necessary as grade changes occur, and revise instrument reference elevations as necessary.

(i) As each instrument is installed, an installation record sheet shall be prepared, including appropriate items from the following list:

(1) Project name.

(2) Contract name and number.

Enclosure No. SECTION 13 80 00 Page 13 brian.polak

(3) Instrument type and number, including readout unit.

(4) Planned location in horizontal position and elevation.

(5) Planned orientation.

(6) Planned lengths and volumes of backfill.

(7) Personnel responsible for installation.

(8) Plant and equipment used, including diameter and depth of any drill casing or augers used.

(9) Date and time of start and completion.

(10) Spaces on record sheet for necessary measurements or readings required at hold points during installation to ensure that all previous steps have been followed correctly, including instrument readings made during installation.

(11) A log of subsurface data indicating the elevations of strata changes encountered in the borehole. Strata soil nomenclature shall be based on profiles and boring logs contained in the Geotechnical Data Report.

(12) Type of backfill used.

(13) As-built plans with location in horizontal position and elevation including:

(a) Elevation referenced to the Project Elevation Datum, together with the location of the point used for the elevation measurement.

(b) Horizontal position referenced both to Kentucky Coordinate System South Zone, as referenced to the North American Datum of 1983 (NAD 83), and to project Baseline Station and Offset, together with the location of the point used for horizontal position measurement.

(c) A location sketch showing the instrument number, taped horizontal ±1 foot from permanent physical features in the field.

A sufficient number of taped measurements shall be included on the sketch to establish a unique horizontal position for the instrument. Is such features are removed, the Contractor shall provide a new sketch, prior to removal, with taped measurements to other features.

(14) As-built orientation.

(15) As-built lengths and volumes of backfill.

(16) Result of post-installation acceptance test.

(17) Weather conditions at the time of installation.

(18) A space on record sheet for notes, including problems encountered, delays, unusual features of the installation, and

Enclosure No. SECTION 13 80 00 Page 14 brian.polak details of any events that may have a bearing on instrument behavior.

(j) An instrument that fails the specified post-installation acceptance test shall be replaced by an identical instrument at no additional cost to the Government.

(k) The Contractor shall submit updated as-built plans showing instrument location plans to the COR within 5 calendar days of completion with the instrumentation installations. The location plans shall be reproducible composite plans of all installed instruments plotted on 11 inch x 17 inch or 24 inch by 36 inch sheets at a scale of 1 inch = 100 feet . The first plans shall be submitted within one month after completion of the first instrument installation, regardless of instrument type. Updated plans shall be submitted every subsequent 4 weeks. Updated plans need not be submitted for periods during which no instruments have been installed.

3.3 INSTALLATION OF VIBRATING WIRE PIEZOMETERS

(a) Vibrating wire piezometers shall be installed, one per borehole, at the locations and depths shown on the Plans or as directed by the

COR.

(b) Maintain an open hole with casing or hollow-stem augers.

Bentonitic drilling mud shall not be used.

(c) The Contractor shall sample continuously through the clays for each piezometer installed. Prior to insertion of the piezometer in the borehole, the piezometer and cavity between filter and diaphragm shall be saturated with clean water and a reading shall be taken of the vibrating wire transducer, thermistor, and corresponding barometric pressure. Saturation shall be maintained throughout the installation.

(d) After insertion of the piezometer a check shall be made to ensure that the piezometer reading agrees with the water head, and the elevation of the diaphragm shall be recorded.

(e) Depth to the top of each increment of granular bentonite shall be checked using a cylindrical sounding hammer. The granular bentonite shall not be tamped.

(f) After completion of installation a post-installation acceptance test shall be performed to verify that the piezometer functions correctly.

(g) After completion of installation, the as-built location in the horizontal position shall be determined to an accuracy of ± 1 foot , and the elevation of the top of the roadway box to an accuracy of ±

0.01 foot . The elevation of the piezometer diaphragm shall also be determined, to an accuracy of ± 0.1 foot .

(h) Terminal boxes to match the piezometer shall be installed so that all piezometers for one location will extend to one terminal box. Conductor cable shall be snaked along the length to the terminal box. Terminal boxes shall have lightning protection.

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3.4 INSTALLATION OF SETTLEMENT PLATES

(a) Settlement platforms shall be fabricated and installed at the locations shown on the plans or as directed by the COR at the top of the select sand layer.

(b) After completion of installation, determine as-built location in horizontal position to an accuracy of ± 1 foot and the elevation of the top of the 2-inch pipe to an accuracy of ± 0.01 foot .

(c) As height of embankment increases, extend 2-inch pipe upward in 5-foot increments, to maintain top of pipe between 1 and 3 feet above embankment surface. When extending pipe, do not rotate pipe already in place. Record extension length to an accuracy of ± 0.005 foot . Survey the elevation of the inner pipe just before and immediately after adding the inner pipe extension so a new reference can be established.

3.5 INSTALLATION OF MAGNET EXTENSOMETERS

(a) Magnet extensometers shall be installed at the locations and depths shown on the Plans or as directed by the COR. The bottom of the access tube shall be a minimum of 15 feet below the top of the Pleistocene sand stratum.

(b) Prior to drilling, the drill rig shall be plumbed to within one degree of vertical.

(c) The Contractor shall sample continuously through the clays with alternating 5-inch Shelby tubes with a piston sampler and split spoon samples for each magnet extensometer installed. The Shelby tubes will be provided to the COR. Four split spoon samples shall be taken of the material assumed to provide base fixity, one at the bottom of the borehole, others at 5, 10, and 15 feet above the bottom of the borehole, and submitted to the COR within 24 hours.

(d) During installation, spider magnets shall be held adequately on the access tube so that they do not slide during installation, but are free to slide subsequently. The access tube shall be coated with heavy grease to fill the annular space between each spider magnet and the access tube, and for a distance of 2 inches above and below each magnet location. For a further distance of 12 inches above and below each magnet location, the access tube shall be coated with silicon grease.

(e) The telescoping couplings shall be installed in the fully extended position. No more than one pop rivet shall be used at each end of each telescoping coupling. No spider magnet shall be installed within 30 inches of a telescopic coupling.

(f) During installation, the access tube shall not be rotated, and connections to actuation devices shall not become intertwined. All actuation devices shall be retrieved, to demonstrate that spider magnets have been actuated.

(g) After completion of installation, a post-installation acceptance test shall be performed to verify that there is no grout in the access tube, that telescoping couplings are in the fully extended position, that no spider magnet varies from its specified position by more than 9 inches and that no spider magnet is nearer than 12 inches above or

Enclosure No. SECTION 13 80 00 Page 16 brian.polak below the end of a coupling an the access tube.

(h) After completion of installation the as-built location in horizontal position shall be determined to an accuracy of ± 1 foot and the elevation of the top of the access tube to an accuracy of 0.01 foot .

3.6 INSTALLATION OF INCLINOMETERS

(a) Inclinometer casings shall be installed at the locations and depths shown on the Plans or as directed by the COR. After installation, the casing groove spiral shall not exceed one degree per 10 feet of length, the orientation of the grooves at the top of the casing shall be within 10 degrees of the planned orientation, and no part of the casing shall deviate from vertical by more than 4 percent of the depth to that part. The bottom of the casing shall be a minimum of 15 feet below the top of the Pleistocene sand.

(b) The Contractor shall sample continuously through the clays with alternating 5-inch Shelby tubes with a piston sampler and split spoon samples for each inclinometer installed. The Shelby tubes will be provided to the COR. Four samples shall be taken of the material assumed to provide base fixity, one at the bottom of the borehole, others at 5, 10, and 15 feet above the bottom of the borehole, and submitted to the COR within 24 hours.

(c) Correct casing groove orientation shall be maintained throughout installation. Once installed the casing cannot be rotated to align the grooves.

(d) Telescoping couplings shall be installed in the fully extended position.

(e) After completion of installation, a post-installation acceptance test shall be performed to verify that there is no grout in the inclinometer casing, that groove orientation and verticality are correct, and that the inclinometer probe tracks correctly in all four orientations. Groove alignment shall be checked with a spiral probe.

(f) After completion of installation, the as-built location in horizontal position shall be determined to an accuracy of ± 0.03 foot , and the elevation of the top of the inclinometer casing to an accuracy of ± 0.01 foot . The point selected to determine horizontal position shall be marked on the casing and indicated on the installation record sheet.

3.7 STRUCTURAL MONITORING POINTS

(a) Structural monitoring points shall be attached to each 3rd Steel H-pile at the south bump-out retaining wall and the north bump-out retaining wall.

(b) Structural monitoring points shall be installed within the top 2 ft of the H-piles and shall be read for both vertical and horizontal movements to an accuracy of + 0.005 ft.

3.8 FIELD CALIBRATION AND MAINTENANCE

The Contractor's instrumentation personnel shall conduct regular maintenance of field terminals and accessible instrument components.

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3.9 DAMAGE TO INSTRUMENTATION

(a) The Contractor shall protect all instruments and appurtenant fixtures, leads, connections, and other components of instrumentation systems from damage due to construction operations, weather, traffic, use, and vandalism.

(b) If an instrument is damaged or inoperative, the Contractor's instrumentation personnel shall repair or replace the damaged or inoperative instrument within 72 hours at no additional cost to the Government. The Contractor shall notify the COR at least 24 hours prior to repairing or replacing a damaged or inoperative instrument.

The COR will be the sole judge of whether repair or replacement is required.

3.10 MONITORING OF INSTRUMENTATION AFTER INSTALLATION

Contractor shall monitor and record the measurements from the instrumentation at a minimum frequency shown below:

Instrument Frequency 1 Frequency 2 Action Level

Threshold

Maximum Level

Threshold

Slope Indicator Twice a week Once a week 0.5 in. 0.75 in.

Settlement Plate Once a week Once a week n/a n/a

Extensometers Once a week Once a week n/a n/a

Vibrating Wire Piezometer

Twice a week Once a week n/a n/a

Structural Monitoring Point

Twice a week Once a week 0.5 in. 0.75 in.

Frequency 1 - To be followed from start of fill placement to 5 calendar days after the end of fill placement at the location of the instrument.

Frequency 2 - To be followed from end of fill placement at the instrument location of the instrument to 3 months after the end of fill placement at the instrument location.

Action Level - Special attention and scrutiny are paid when movements reach action levels but within maximum level limits. Notify the Contracting Officer.

Maximum Level - Additional contingency plans and procedures are implemented when maximum levels are reached. Notify the Contracting Officer.

3.11 DISCLOSURE OF DATA

The Contractor shall not disclose any instrumentation data to third parties and shall not publish data without prior written consent of the Government.

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3.12 DISPOSITION OF INSTRUMENTS

Instruments shall become the property of the Government upon completion of the construction.

3.13 MEASUREMENT AND PAYMENT

3.13.1 Measurement

(a) Geotechnical Instrumentation will not be measured for payment, for the indicated instruments, complete in place, as delineated in the drawings and specified herein. Furnishing and installing instrumentation includes the following:

(1) Vibrating wire piezometers one per borehole. (28 total required)

(2) Settlement plates.

(3) Magnetic extensometers.

(4) Inclinometer casings.

(5) Terminal boxes.

(6) Benchmarks.

(7) Vibrating wire piezometer readout units.

(8) Magnetic extensometer readout units.

(9) Magnetic extensometer reed switch probe, reel and tape.

(9) Inclinometer probe, cable, readout unit.

(10) Inclinometer software.

(11) Structural monitoring points.

(b) The locations and depths (if applicable) are shown on sheet B-105. It should be noted that depths listed on Sheet B-105 are installation depths from existing grade. Lump sum price prior to the start of fill placement. The lump sum price for the instrument installations should consider that additional fill will be placed and that the instruments will need to be extended/raised as the fill placement progresses and the lump sum price should include the additional labor and material required to extend/raise instruments.

3.13.2 Base Contract Payment

(a) Payment for the following items will be made at the contract line item price for Base Contract "Geotechnical Instrumentation".

Price and payment shall constitute full compensation for furnishing readout units for the following materials, including factory calibrations, pre-installation acceptance testing. Instruction manuals, and delivery to the COR as specified:

(1) Vibrating wire piezometers: readout unit.

Enclosure No. SECTION 13 80 00 Page 19 brian.polak

(2) Inclinometers: probe, cable, and readout unit.

(3) Inclinometer software.

(b) Payment for the following items will be made at the contract line item price for Base Contract "Geotechnical Instrumentation".

Price and payment shall constitute full compensation for furnishing and installing instruments including all materials in place, all cable, labor, tools, and equipment, instruction manuals, drilling, sampling, pre-installation acceptance testing, installation, post-installation acceptance testing, installation of surface and other protection, obtaining formal initial reading and determination of as-built location:

(1) Settlement Plates; to include initial installation plus all lengths of pipe subsequently added to final grade.

(2) Inclinometer Casings; with protective exterior casing.

(3) Vibrating Wire Piezometers, One per Borehole: Provide twice the length of cable required by distance from instrument to terminal box. Cable shall be snaked to terminal box to allow for settlement.

(4) Terminal Boxes.

(5) Structural Monitoring Points

3.13.3 Option One Payment

(a) Payment for the following items will be made at the contract line item price for Option One "Geotechnical Instrumentation". Price and payment shall constitute full compensation for furnishing and installing instruments including all materials in place, all cable, labor, tools, and equipment, instruction manuals, drilling, sampling, pre-installation acceptance testing, installation, post-installation acceptance testing, installation of surface and other protection, obtaining formal initial reading and determination of as-built location:

(1) Settlement Plates; to include initial installation plus all lengths of pipe subsequently added to final grade.

3.13.4 Option Two Payment

(a) Payment for the following items will be made at the contract line item price for Option Two "Geotechnical Instrumentation". Price and payment shall constitute full compensation for furnishing readout units for the following materials, including factory calibrations, pre-installation acceptance testing. Instruction manuals, and delivery to the COR as specified:

(1) Vibrating wire piezometers: readout unit.

(2) Inclinometers; probe, cable, and readout unit.

(3) Inclinometer software.

(4) Magnetic extensometer reed switch probe, reel and tape.

Enclosure No. SECTION 13 80 00 Page 20 brian.polak

(5) Magnetic extensometer readout unit.

(6) Structural Monitoring Points

(b) Payment for the following items will be made at the contract line item price for Option Two "Geotechnical Instrumentation". Price and payment shall constitute full compensation for furnishing and installing instruments including all materials in place, all cable, labor, tools, and equipment, instruction manuals, drilling, sampling, pre-installation acceptance testing, installation, post-installation acceptance testing, installation of surface and other protection, obtaining formal initial reading and determination of as-built location:

(1) Settlement Plates; to include initial installation plus all lengths of pipe subsequently added to final grade.

(2) Inclinometer Casings; with protective exterior casing.

(3) Vibrating Wire Piezometers, one per Borehole: Provide twice the length of cable required by distance from instrument to terminal box. Cable shall be snaked to terminal box to allow for settlement.

(4) Terminal boxes.

3.13.5 Option Three Payment

(a) Payment for the following items will be made at the contract line item price for Option Three "Geotechnical Instrumentation". Price and payment shall constitute full compensation for furnishing readout units for the following materials, including factory calibrations, pre-installation acceptance testing. Instruction manuals, and delivery to the COR as specified:

(1) Vibrating wire piezometers: readout unit.

(2) Inclinometers; probe, cable, and readout unit.

(3) Inclinometer software.

(4) Magnetic extensometers; to include initial installation plus all lengths of pipe subsequently added to final grade.

(5) Terminal boxes.

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