Specification 02 32 00.00 25 dated 2022-08-24.pdf

Willamette Falls Seismic and Safety Upgrades

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 32 00.00 25

SUBSURFACE DRILLING, SAMPLING, AND TESTING

PART 1 GENERAL

1.1 MEASUREMENT AND PAYMENT

1.2 REFERENCES

1.3 SYSTEM DESCRIPTION

1.3.1 Core Drilling

1.3.2 Optical Televiewer Logging

1.3.3 Unconfined Compressive Tests of Cores

1.3.4 Geotechnical Investigation Report

1.3.5 Sequencing and Scheduling

1.3.5.1 Schedule of Drilling, Sampling, and Optical Televiewer

Logging

1.3.5.2 Order of Work

1.3.5.2.1 Inspector

1.3.5.2.2 Government Oversight

1.4 SUBMITTALS

1.5 QUALITY ASSURANCE

1.6 DELIVERY, STORAGE, AND HANDLING

1.6.1 General

1.7 PROJECT/SITE CONDITIONS

1.7.1 Environmental Requirements

1.7.2 Field Measurements

PART 2 PRODUCTS

2.1 CONTAINERS

2.1.1 Sample Jars

2.1.2 Shipping Boxes

2.1.3 Core Boxes

2.2 LABELS

2.2.1 Sample Jar Labels

2.2.2 Shipping Box Labels

2.2.3 Core Box Labels

2.3 EQUIPMENT AND SUPPLIES

2.3.1 Core Drilling

PART 3 EXECUTION

3.1 MOBILIZATION AND DEMOBILIZATION

3.1.1 Mobilization

3.1.2 Demobilization

3.2 Order of Work

3.3 IDENTIFYING SAMPLES

3.4 CORE DRILLING

3.4.1 Procedure

3.4.2 Arrangement of Core

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3.4.3 Selection of Core Specimens for Strength Testing

3.4.4 Labeling, Marking and Packing Core

3.4.5 Disposition of Cores

3.5 Optical Televiewer Logging

3.6 UNCONFINED COMPRESSIVE TESTS OF CORES

3.7 SUPPLEMENTAL BORINGS

3.8 BACKFILLING

3.8.1 Core Holes

3.9 RECORDS

ATTACHMENTS:

approximate locations of drill holes

-- End of Section Table of Contents --

SECTION 02 32 00.00 25 Page 2

SECTION 02 32 00.00 25

SUBSURFACE DRILLING, SAMPLING, AND TESTING

PART 1 GENERAL

1.1 MEASUREMENT AND PAYMENT

Measurement and payment will be as specified in Section 01 22 00.00 25, MEASUREMENT AND PAYMENT.

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 C39/C39M (2021) Standard Test Method for

Compressive Strength of Cylindrical

Concrete Specimens

ASTM D2938 (1995; Reapproved 2002) Standard Test

Method for Unconfined Compressive Strength of Intact Rock Core Speciments

1.3 SYSTEM DESCRIPTION

Provide the data to determine the type, nature, and characteristics of subsurface materials and the extent and conditions of the various materials as they exist to the depths and at the locations specified. This is to be accomplished by means of core drilling, optical televiewer logging, and unconfined compressive strength tests on collected cores.

1.3.1 Core Drilling

Core drilling must be 3.79 inch Diameter. Core Drilling of cores must be by HQWL(3), the HQ wirelin triple-barrel method, performed in accordance with ASTM D2113. The method used must provide equally good recovery of cores from concrete, basalt, and ashlar masonry consisting of basalt.

1.3.2 Optical Televiewer Logging

After the core drilling is performed, an optical televiewer probe must be lowered into the core hole to perform optical televiewer logging to evaluate the condition of the material exposed on the core hole wall. The optical televiewer logging must be performed by a subconsultant with more than fiv years of experience. Features to be investigated are:

Condition of concrete or ashlar masonry

Deficiencies such as voids and cavities in concrete or ashlar masonry

Condition of the concrete/bedrock or ashlar/bedrock contact

Quality and condition of basalt bedrock

Discontinuities existing in basalt bedrock

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Characteristics of the discontinuities existing in bedrock

1.3.3 Unconfined Compressive Tests of Cores

Unconfined compressive strengths of the cores of the following materials must be determined in accordance with ASTM C39/C39M and ASTM D2938 as appropriate. Required numbers of tests for each material are indicated in parentheses:

Concrete of Concrete Canal Wall (6)

Ashlar of Masonry Guard Lock Wall (2)

Basalt bedrock (9)

1.3.4 Geotechnical Investigation Report

a. Submit a Geotechnical Investigation Report that summarizes the work performed as required in this Section. Include the following in the report:

Summary Of Coring, Optical Televiewer Logging

Unconfined Compressive Tests

Boring Logs

Photographs Of Cores

Optical Televiewer Logging Results

Unconfined Compressive Strengths Of Collected Cores

Descriptions Of Concrete, Ashlar, And Bedrock Encountered In Core

Holes

Descriptions Of Deficiencies And Voids Observed In Core Holes

b. Preliminary images of the optical televiewer logging must be pdf'd in real time and be made available to the Government within two hours of the completion of logging.

c. Perform unconfined compressive tests on designated cores within seven calendar days after the cores are collected. Preliminary results of the unconfined compressive tests must be submitted to the Government as soon as they become available from the testing laboratory.

d. A draft of Geotechnical Investigation Report must be submitted to the Government within 20 business days after the conclusion of the drilling work. The Government will provide comments on the draft within

10 business days of the receipt of the draft report. The Contractor must incorporate the comments and provide the final report within 10 business days of the receipt of the comments.

1.3.5 Sequencing and Scheduling

1.3.5.1 Schedule of Drilling, Sampling, and Optical Televiewer Logging

Prior to starting work, submit a Work Plan for drilling, sampling, testing, and safety. IOncudThe Work Plan must include, but is not limited to, the proposed method of drilling and sampling including a description of the equipment and sampling tools that will be used, a listing of any subContractors to include a description of how the subContractors will be used and a description of all methods and procedures that will be utilized to insure a safe operation and to protect the environment. No work will be performed until this plan has been approved and no deviation from the approved plan will be permitted without prior approval by the Contracting

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Officer. The schedule of Drilling, Sampling, and Optical Televiewer

Loggingis listed in the following schedule: Note that the indicated depths are estimates and actual depths must be determined in the field.

SCHEDULE OF DRILLING, SAMPLING AND TESTING

HOLE

NO.

METHOD ESTIMATED

DEPTH (FEET)

VERTICAL

OR

INCLINED

SPECIAL

INSTRUCTIONS

CW-1 HQWL(3)

Coring

30 (concrete)

40 (basalt)

70 Total

VERTICAL PERFORM OPTICAL TELEVIEWER

LOGGING AFTER CORE HOLE IS

DRILLED.

CW-2 HQWL(3)

Coring

56 (concrete)

40 (basalt)

96 Total

VERTICAL PERFORM OPTICAL TELEVIEWER

LOGGING AFTER CORE HOLE IS

DRILLED

GL-1 HQWL(3)

Coring

15 (ashlar)

50 (basalt)

65 Total

VERTICAL PERFORM OPTICAL TELEVIEWER

LOGGING AFTER CORE HOLE IS

DRILLED.

Note: Holes CW-1 and CW-2 must be drilled from the top of the Concrete

Canal Wall at the locations designated by the Contracting Officer. Hole

GL-1 must be drilled through a blockout in the concrete deck at a location that will be used for a rock anchor in a concrete pilaster at the Masonsry

Guard Lock Wall, at the location designated by the Contracting Officer.

Pilaster does not need to be on place prior to drilling GL-1.

1.3.5.2 Order of Work

This subsurface investigation must be performed before the rock anchor construction specified in Section 31 68 13.00 25 SOIL AND ROCK ANCHORS.

Contractor must develop an order of work in Work Plan.

1.3.5.2.1 Inspector

Contractor must provide a qualified, licensed Geotechnical Engineer or

Geologist experienced in subsurface exploration for each drill unit to oversee all drilling, sampling, and field testing operations. This individual must be responsible for the preparation and direction of a separate log and/or report for each boring and associated optical televiewer logging. This individual is also responsible for the preparation of all coresamples of concrete and rock for delivery to the designated testing laboratory.

1.3.5.2.2 Government Oversight

The presence of a Government representative or the keeping of separate drilling records by the Contracting Officer does not relieve the Contractor of the responsibility for the work specified in this specification.

1.4 SUBMITTALS

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

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

SECTION 02 32 00.00 25 Page 5

Work Plan; G

SD-02 Shop Drawings

Geotechnical Investigation Report; G

SD-03 Product Data

Permits, Certifications, and Licenses

SD-04 Samples

Drilling Log; G

1.5 QUALITY ASSURANCE

Comply with all Federal, State and local laws, regulations and ordinances relating to the performance of this work. Procure all required permits, certifications and licenses required by Federal, State, and local law for the execution of this work. Submit copies of all permits, certifications, and licenses prior to starting work. This submittal must also include a statement of the prior experience, in the type of work described in these specifications, of the person or persons designated to perform the work specified herein.

1.6 DELIVERY, STORAGE, AND HANDLING

1.6.1 General

The Contractor is solely responsible for preserving all samples in good condition. Keep Samples from freezing and from undue exposure to the weather, and keep all descriptive labels and designations on sample jars, tubes, and boxes clean and legible until final delivery of samples to, and acceptance by, the Contracting Officer. Except as otherwise specified, deliver samples to the location designated by the Contracting Officer.

Samples must be delivered within the time limits specified for each type of investigation or in accordance with schedules prepared by the Contracting

Officer.

1.7 PROJECT/SITE CONDITIONS

1.7.1 Environmental Requirements

Comply with Section 01 57 19.00 25, TEMPORARY ENVIRONMENTAL CONTROLS.

1.7.2 Field Measurements

The approximate locations of drill holes are shown on the contract drawings. The actual locations will be established in the field by the

Contracting Officer prior to the start of work. The elevations of the established locations will also be provided by the Contracting Officer prior to the start of work. Provide access to the locations as necessary for the prosecution of the work. Since no separate payment will be made for access construction, include all costs associated with this in the cost of drilling .

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PART 2 PRODUCTS

2.1 CONTAINERS

Furnish jars and boxes that meet the following requirements. All such containers will become the property of the Government and the cost thereof will be included in the contract price for the applicable item for which payment is provided.

2.1.1 Sample Jars

Sample jars must be 1 pint capacity, wide-mouth glass or plastic jars with moisture-tight screw tops.

2.1.2 Shipping Boxes

Boxes for shipping sample jars must be corrugated cardboard boxes that have the capacity to hold no more than 12 sample jars and the strength to contain and protect the jars and their contents under ordinary handling and environmental conditions.

2.1.3 Core Boxes

Use longitudinally partitioned,standard corrugated plastic or wooden core boxes that can hold HQ-size cores.

2.2 LABELS

2.2.1 Sample Jar Labels

A printed or type-written, fade resistant and waterproof label must be affixed to the outside of each jar and must contain the following information:

PROJECT

LOCATION

HOLE NO.

JAR SAMPLE ID

DEPTH OF SAMPLE

2.2.2 Shipping Box Labels

Each box of jar samples must be identified with weatherproof and wear-proof labels indicating the following:

PROJECT

LOCATION

HOLE NO.

JAR SAMPLES IN BOX

2.2.3 Core Box Labels

Core boxes must be identified with permanent markers or stenciled labels.

The information on this label must contain the following:

PROJECT

LOCATION

HOLE NO.

BOX NO.

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TOTAL NUMBER OF BOXES FOR THE HOLE

2.3 EQUIPMENT AND SUPPLIES

2.3.1 Core Drilling

Core drilling must meet the requirements specified above in paragraph 1.3.1

Core Drillling. Provide proposed make and model of core-drilling machinery in Work Plan.

PART 3 EXECUTION

3.1 MOBILIZATION AND DEMOBILIZATION

3.1.1 Mobilization

Mobilization consists of the delivery to the site of all plant, equipment, materials and supplies to be furnished by the Contractor, the complete assembly in satisfactory working order of all such plant and equipment at the jobsite and the satisfactory storage at the site of all such materials and supplies.

3.1.2 Demobilization

Demobilization consists of the removal from the site of all plant, equipment, materials and supplies after completion of the work and also includes, at the direction of the Contracting Officer, the cleanup and removal of all scrap, waste backfill material, waste drilling fluid, soil contaminated with engine/hydraulic oil, backfilling all sumps or excavations resulting from the operations and, in general, returning the site as close to its original condition as possible.

3.2 Order of Work

a. Before Holes CW-1 and CW-2 can be drilled, part of the existing concrete/metal deck on the Concrete Canal Wall needs to be removed as shown on plan sheet SD-001 to expose existing concrete anchors on the top of the Concrete Canal Wall. The Contracting Officer will identify two existing concrete anchors, which will be the locations of the Holes

CW-1 and CW-2. The two existing concrete anchors at these locations must be destressed, their bearing plates and anchor nuts removed, and the grouted anchor bar cored over and removed as shown in plan sheet

SD001. The drill string for HQWL(3) coring must be lowered into the cored-out holes to start Holes CW-1 and CW-2.

b. For Hole GL-1, the Contracting Officer will identify the pilaster where Hole GL-1 must be located. The pilaster must be constructed first before Hole GL-1 may be drilled.

3.3 IDENTIFYING SAMPLES

Sample jars, shipping boxes, core boxes and labels must comply with PART 2, paragraphs SAMPLE JARS, SHIPPING BOXES, COREBOXES, and LABELS, respectively. In addition, a moisture proof label containing the project name, hole number and sample number must be placed inside the jar or this information can be written using a waterproof pen or scribed on the jar lid. Take all precautions required to insure that the shipping boxes and core boxes are not subjected to rough handling or damaging environmental conditions, and complies with paragraph DISPOSITION OF CORES.

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3.4 CORE DRILLING

Core drilling must be by the HQWL(3), HQ wireline triple-barrel method.

3.4.1 Procedure

All holes must be drilled vertically to the bottom elevations or depths specified unless indicated in the schedule of borings or directed to be drilled otherwise. Field verify the contact of concrete or masonry with bedrock. Final depths will be contingent on the depths of these contacts.

Off-setting of borings from the locations specified in the Plan of Borings or as shown on the drawings, will not be permitted without prior approval.

Casing through the old concrete or masonry may be required. This casing must be sealed in the rock at the elevation where rock is encountered prior to commencement of rock coring. Operate the drills at required speeds and down pressures to control drill fluid pressures and quantities to insure maximum core quality and recovery in whatever kind of rock is encountered.

Where soft or broken rock is encountered, reduce the length of runs to 5 feet or less in order to reduce and/or keep core loss and core disturbance to the minimum. Failure to comply with the foregoing procedures will constitute justification for the Contracting Officer to require redrilling, at the Contractor's expense, of any boring from which the core recovery is unsatisfactory. Exercise particular care in recording zones of water loss, cavities, rod jerks, rough drilling and other unusual and non-ordinary coring experiences that, supplementing the core record, will throw light on the nature and the extent of any fracturing or abnormalities.

3.4.2 Arrangement of Core

Core boxes must comply with PART 2, paragraph CORE BOXES. All cores must be arranged neatly in the partitioned boxes in the same sequence in which they occurred before removal from the hole. Facing the open box with the hinged cover above and the open box below, cores must be arranged in descending sequence beginning at the left end of the trough nearest the hinges and continuing in the other troughs from left to right. The highest part of the core must be placed in box 1, and the lower portions of the core must be placed in the other boxes in consecutive order.

3.4.3 Selection of Core Specimens for Strength Testing

Representative cores of concrete, ashlar, and basalt bedrock must be selected for unconfined compressive testing in consultation with the

Contracting Officer. Select at least two more specimens of each material than are indicated as the required number of tests in paragraph 1.3.3

Unconfined Compressive Tests of Cores to allow for core breakage during transportation, handling, and preparation of of the core specimens for testing. Spacer blocks must be marked and placed in the core box to show where samples have been removed for testing..

3.4.4 Labeling, Marking and Packing Core

Stenciled labels or black waterproof pen markings for core boxes complying with paragraph CORE BOX LABELS must be placed on the inside and outside of the top cover in addition to each end. In addition, the depths (or elevations) of each core run/pull must be marked with a black waterproof pen on the spacer blocks that are placed between core pulls. When a box is full, the space between the core and the trough sides must be filled with wooden core blocks or other packing material approved by the Contracting

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Officer.

3.4.5 Disposition of Cores

While onsite, protect the filled core boxes from direct sunlight, precipitation, and freezing by some form of Contracting Officer approved shelter that allows ventilation to the boxes. Upon completion of core drilling and sampling operations, core boxes containing cores must be stored in an area provided by the Contracting Officer near the site of drilling. Government intends to use cores of ashlar masonry, concrete, and bedrock for own testing purposes such as tilt table tests. Therefore, care must be exercised to preserve all cores collected.

3.5 Optical Televiewer Logging

a. After the core drilling has reached the bottom of the hole, flush the hole with fresh water and leave overnight to let suspended solids in the hole settle to the bottom in preparation for the optical televiewer logging. If the suspended solids do not settle by leaving overnight, a flocculant may be used to expedite the suspended solid settlement. The flocculant must be environmentally safe and approved for use by the Contractor. The proposed flocculant must be described in the Work Plan.

b. The optical televiewer logging must be performed to collect images of the walls of the entire core holes with minimum interference. A data station with an LCD monitor must be located at the work platform for real-time viewing of the images and manual data collection by the

Contracting Officer or their representative. The Contractor must obtain a clear 360-degree digital image of the entire length of the core hole side wall. The locations of any cold joints, breaks, voids, cavities, or other defects or abnormalities in concrete must be highlited on the images. For ashlar masonry, the locations of masonry joints, voids, cavities, or other defects or abnormalities in ashlar masonry must be highlighted images.

c. The Contractor must obtain a clear 360-degree digital image of the contact between the Concrete Wall (Holes CW-1 and CW-2) or the ashlar masonry (Hole GL-1) and the basalt bedrock. The tightness of these voids or presence of voies at these contacts must be identified and highlighted.

d. The optical televiewer logging in the bedrock portion of the core holes must show the quality and condition of the rock, along with discontinuities existing in the rock. The televiewer image must be processed to indicate the locations, apertures, and orientations of these discontinuities. The poles of the observed discontinuities must be plotted in the lower hemisphere. The Contractor must provide a tabulation in MS Excel format of information obtained from the imaging of each core hole, including, but not limited to:

Hole No.

Location

Depth of top of rock

Depth of each discontinuity

Aperture, dip, and azimuth

e. The results of the optical televiewer logging must be included in the Geotechnical Investigation Report. Field measurements and

SECTION 02 32 00.00 25 Page 10 post-processing of optical televiwer logging must only be condicuted by qualified personnel with extensive relevant experience with optical televiewer logging. The proposed firm and personnel that the Contractor proposes to hire to perform the work must be included in the Work Plan.

3.6 UNCONFINED COMPRESSIVE TESTS OF CORES

a. The number of unconfined compressive tests are as follows for different materials in each Hole as follows:

Hole CW-1:

Concrete - three (3)

Basalt bedrock - three (3)

Hole CW-2:

Concrete - three (3)

Basalt bedrock - three (3)

Hole GL-1:

Ashlar masonry - three (3)

Basalt bedrock - three (3)

b. These unconfined compressive tests must be performed by a laboratory certified to conduct these test in accordance with ASTM C39/C39M and

ASTM D2938. The testing laboratory that the Contractor proposes to use must be included in the Work Plan.

3.7 SUPPLEMENTAL BORINGS

Core holes that are abandoned or from which unsatisfactory samples or cores are obtained will be supplemented by other core holes adjacent to the original (must be located at an adjacent, existing concrete anchor location) in order that satisfactory samples or the required information will be obtained. Actual locations of any supplemental core holes will be established by the Contracting Officer. Penetration to the depth where the original was abandoned or to the depths where unsatisfactory samples were obtained may be made by any method selected by the Contractor that in the opinion of the Contracting Officer will permit satisfactory completion and sampling below the elevation where the last satisfactory sample was obtained in the abandoned or satisfactory sampling in the reaches where satisfactory samples were not obtained in the original core holes. No payment will be made for supplemental core holes that are required to be drilled to replace core holes that were abandoned or from which satisfactory samples were not obtained because of mechanical failure of drilling and sampling equipment, negligence on the part of the Contractor, or other preventable cause for which the Contractor is responsible except that payment will be made for acceptable portions of these supplementary core holes below the depths or outside the reaches for which payment was made for the original core holes.

3.8 BACKFILLING

3.8.1 Core Holes

If supplemental borings (paragraph 3.7) are not drilled, Holes CW-1, CW-2, and GL-1 will be used as pilot holes for rock anchors specified in Section

31 68 13.00 25. Therefore, there is no need to backfill these core holes.

However, when supplemental borings are drilled, the original core holes must be backfilled and abandoned in accordance with all Federal, State, and

SECTION 02 32 00.00 25 Page 11 local laws, regulations and ordinances. Preserve all holes in good condition until final measurement and until the records and samples have been accepted. As a minimum, core holes to be backfilled must be grouted from the bottom of the hole to within 2 feet of the ground surface using a grout mixture of six to eight gallons of water per sack (94 pounds) of portland cement. All grout must be pumped through a tremie pipe that is inserted to the bottom of the boring to insure that the grout fills the full extent of the hole. The remaining ungrouted top 2 feet of the hole must be backfilled with concrete. All backfilling operations must be performed in the presence of the Contracting Officer or their representative and, if required by regulation, Federal, State, and local officials. No separate payment will be made for backfilling drill holes.

The cost of this work must be included in the drilling costs.

3.9 RECORDS

Submit preliminary, legible copies of Drilling Log and records to the

Contracting Officer within 5 business days after a hole is completed. All such records must be recorded during the actual performance of the work and must be preserved in good condition and order until they are delivered and accepted. The Contracting Officer has the right to examine and review all such records at any time prior to their delivery and has the right to request changes to the record keeping procedure. The final Drilling Log must be included in Geotechnical Investigation Report. The following information must be included on the logs or in the records for each hole:

a. Hole number or designation and elevation of top of hole.

b. Driller's name and Geologist's name.

c. Make, size, and manufacturer's model designation of drilling, equipment.

d. Type of drilling, operation by depth.

e. Hole diameter.

f. Dates and time by depths when drilling operations were performed.

g. Time required for drilling each run.

h. Drill action, rotation speed, hydraulic pressure, water pressure, tool drops, and any other unusual and non-ordinary experience which could indicate the subsurface conditions encountered.

i. Depths at which samples or cores were recovered or attempts made to sample or core including top and bottom depth of each run.

j. Classification and description by depths of rock materials cored including rock type, composition, texture, presence and orientation of bedding, floiation, or fractures, presence of vugs or other interstices, and the RQD for each cored interval.

k. Percentage of sample or core recovered per run.

l. Depth at which groundwater is encountered initially and when stabilized.

m. Depths at which drill water is lost and regained and amounts.

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n. Depths at which the color of the drill water return changes.

o. Type and weight of drill fluid.

p. Depth of bottom of hole.

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