Section_31_41_17_-_Amd_0002.pdf

Portage Lake Revetment Repairs FY17PORTAGELAKE Amendment 2 08/30/17

SECTION 31 41 17

STEEL SHEET PILING

04/09

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

The work required under this section includes furnishing all materials and equipment and performing operations such as, but not limited to, placement of a steel sheet pile (SSP) wall, special piles, pipe pile termination and appurtenances as shown on the drawings. All work shall be conducted in a manner to prevent damage to the timber structures which are to remain.

All work and materials shall be in accordance with the requirements specified herein and shown on the contract drawings. Miscellaneous metal items are excluded in this section and are included in Section 05 50 14

STRUCTURAL METAL FABRICATIONS.

1.2 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM A 370 (2008a) Standard Test Methods and Definitions for Mechanical Testing of Steel Products

ASTM A 572/A 572M (2007) Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel

1.3 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. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Selected Hot-Rolled Steel Sheet Piles; G, ECD

Submit for approval manufacturer's specifications which demonstrate that the selected hot-rolled section SSP section will meet the requirements specified herein and shown on the drawings.

The Contractor shall submit information for approval prior to ordering materials. Hot-rolled steel sheet piling shall comply with ASTM A 572/A 572M . In the case of special piles or non-standard piles, the Contractor shall also submit for approval detailed design analysis and calculations. The Contractor shall submit shop drawings and layouts for the selected hot-rolled sections, all necessary miscellaneous steel, and special

SECTION 31 41 17 Page 1 fabricated piles.

Work Plan; G, ECD

Submit the means and methods to be used for required SSP construction. Include measures to be taken to protect partially completed work in the event of cessation of work. The plan shall be submitted at least 14 calendar days prior to start of required work.

Pile Placement Equipment; G, AOF

Complete descriptions of sheet piling placement equipment including hammers, extractors, protection caps and other installation appurtenances shall be submitted for approval prior to commencement of work.

SD-02 Shop Drawings

Steel Sheet Piling; G, AOF

Detail drawings for sheet piling including fabricated sections shall show complete piling dimensions and details, placement starting point, sequence and location of installed piling and diametric pan layout. Detail drawings shall include details and dimensions of templates and other temporary guide structures for installing piling. Detail drawings shall also provide details of the method of handling piling to prevent permanent deflection, distortion or damage to piling interlocks. Drawings shall be submitted for approval at least 14 days prior to start of required work.

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SD-06 Test Reports

Materials Tests; FIO

Certified materials test reports showing that sheet piling and appurtenant metal materials meet the specified requirements shall be submitted for each shipment and identified with specific lots prior to installing materials.

SD-07 Certificates

Pulling and Reinstalling; G, AOF

The proposed method of pulling sheet piling shall be submitted and approved prior to pulling any piling. The method shall be submitted at least 14 calendar days prior to start of required work.

Driving; FIO

Records of the sheet piling driving operations shall be submitted after driving is completed. These records shall provide a system of identification which shows the disposition of approved piling in the work, driving equipment performance data, piling penetration rate data, piling dimensions and top and bottom elevations of installed piling. The Contractor shall record whether piles are driven singly or in groups of two or more sheets. The record shall include the blow count per foot of penetration when an impact hammer is used, except for the last foot for which the blow count per inch shall be recorded. The rate of penetration per minute shall be recorded when a vibratory hammer is used. The driving records shall be furnished each day with the records of inspection. The format for placement records shall be as directed by the Government's On-site Representative. Any unusual conditions encountered during pile installation shall be recorded and immediately reported to the Government's On-site Representative.

1.4 DELIVERY, STORAGE AND HANDLING

Materials delivered to the site shall be new and undamaged and shall be accompanied by certified test reports. The manufacturer's logo and mill identification mark shall be provided on the sheet piling as required by the referenced specifications. Sheet piling shall be stored and handled in the manner recommended by the manufacturer to prevent permanent deflection, distortion or damage to the interlocks. Storage of sheet piling shall also facilitate required inspection activities. Piles of different kinds shall not be intermixed in the stockpiles.

1.4.1 Marking

Each sheet pile shall have its ASTM Specification No., steel grade and manufacturer's section identification number painted on or near each end.

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PART 2 PRODUCTS

2.1 STEEL SHEET PILING

All steel sheet piling shall be formed from one homogeneous steel sheet of the required thickness. Sheet piling shall be as shown on the plan sheets.

The interlocks of sheet piling shall be free-sliding, provide a swing angle suitable for the intended installation but not less than 5 degrees when interlocked, and maintain continuous interlocking when installed.

Sheet piling including special fabricated sections shall be full-length sections of the dimensions shown on the drawings. Fabricated sections shall conform to the requirements herein and the piling manufacturer's recommendations for fabricated sections. Metalwork fabrication for sheet piling shall be as specified herein and Section 05 50 14 MISCELLANEOUS METAL. Sheet piling shall be of the type specified and shown and shall have a web thickness not less than that specified herein. Sheet piling sections, including fabricated sections, shall be full length without splices and shall be furnished 1 footlonger than the length indicated on the drawings for cut-off purposes due to damage during placement. Each sheet shall be provided with a standard pulling hole located approximately 6 inches from the top of each sheet pile, unless otherwise shown or directed.

2.1.1 Hot-Rolled Steel Sheet Piles

The hot-rolled steel sheet piling shall meet or exceed the properties listed in the following table, fulfill the requirements of the Paragraph titled "SUBMITTALS" and be as approved by the Government's On-site Representative.

PROPERTIES OF HOT-ROLLED SSP

Location Nominal Section Modulus in the In3 Per Lin. Ft. of Wall Project @ 50 ksi Y.S.

(ASTM A 572)

North & South Revetment 23.50 Sec.

NOTE: The nominal section modulus equals M/Fa, where Fa equals allowable bending stress. The allowable bending stress equals fifty percent (50%) of the yield strength (Y.S. or Fy).

a. Web and flange nominal thickness shall be not less than 0.375 inches.

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Any changes in pile layout as shown will not be allowed without appropriate design calculations which shall be submitted for approval.

Alternate sections of piling will be allowed for use provided that all other requirements of the paragraph entitled "SUBMITTALS" are met, and that the substitution is approved by the Government's On-site Representative. The construction of the hot-rolled sheet pile walls using a section other than as shown and specified shall include all related adjustments to other elements of the structure to adapt it to the Contractor's hot-rolled design, and shall be provided at no additional cost to the Government. All other requirements of these specifications for the steel sheet piling structure shall apply.

2.2 APPURTENANT METAL MATERIALS

Metal plates, angles, bolts, nuts, wales and other appurtenant fabrication and installation materials for special attachments shall conform to manufacturer's standards and to the requirements specified in the respective sheet piling standards and in Section 05 50 14 MISCELLANEOUS

METALS.

2.3 TESTS, INSPECTIONS, AND VERIFICATIONS

Requirements for material tests, workmanship and other measures for quality assurance shall be as specified herein and in Section 05 50 14

MISCELLANEOUS METALS.

2.3.1 Material Tests

Sheet piling and appurtenant materials shall be tested and certified by the manufacturer to meet the specified chemical, mechanical and section property requirements prior to delivery to the site. Testing of sheet piling for mechanical properties shall be performed after the completion of all rolling and forming operations as specified in ASTM A 370 .

2.4 FABRICATION OF SPECIAL ATTACHMENTS

2.4.1 General

The Contractor shall use factory-fabricated special piles or shall fabricate special attachments in accordance with the plans. All special piles shall be fabricated of ASTM A 572/A 572M , Grade 50 steel sheet piling and structural sections. Attachments to existing sheet piling shall be accomplished by fabricating a 1/2 inch thick steel plate and bolting SSP ball and joint ends over the entire length of the plate. The plates shall rest on the channel bottom and not be driven. Additional information can be found in SECTION 05 50 14, MISCELLANEOUS METAL and the paragraph entitled Bolted Connections.

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2.4.2 Bolted Connections

Bolted connections for special attachments shall be made with high-strength bolts in accordance with the applicable provisions of AISC S 329 and AISC S 335. The bolts shall be 7/8 inch diameter, spaced 12 inches maximum. Slotted holes shall be drilled into the SSP sections to accommodate the bolts for the steel plate. The connection shall be snug-fit until placement of the special attachment and adjoining SSP is completed, at which time the bolts shall be tightened. The use of a diver will be necessary for this work.

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Restrictions

No pile driving is allowed between 7pm and 7am unless notice and approval from the Government's On-site Representative is obtained 48 hours in advance.

3.1.2 Pile Driving Equipment

Pile driving equipment shall be in accordance with the Contractor's submittal for equipment, as approved by the Government's On-site Representative. Barges on which pile placement equipment is mounted shall be anchored against movement, independent from the wall, during placement of piles. Any dredging required in the Inner Harbor for the Contractor to achieve working depth of the floating plant shall be incidental to the driving of steel sheet pile. See SECTION 35 20 23 Dredging regarding dredging operations, placement of spoils, and pre/post surveys.

3.1.2.1 Driving Hammers

Hammers shall be steam, air, diesel drop, single-acting, double-acting, differential acting, or vibratory type. The driving energy of the hammers shall be as recommended by the manufacturer for the piling weights and subsurface materials to be encountered.

3.1.2.2 Placing

Any excavation required within the area where sheet pilings are to be installed shall be completed prior to placing sheet pilings. The drive lineshall be cleared prior to driving. Stone materials ranging from 50 lbs to 4 tons are known to exist in the drive line. Material can be expected on average to -12.0 LWD but in some areas can reach depths of -20.0 LWD.

Material cleared from the drive line may remain in the non-federal channel in a manner to not obstruct recreational navagation and replaced after sheet pile driving is complete. Pre and post surveys shall be taken to verify quantity of material removed and replaced material after driving.

See SECTION 35 20 23 Dredging regarding dredging operations, placement of spoils, and pre/post surveys. Pilings shall be carefully located as shown on the drawings. Interlocks of piles shall be placed and driven with the ball end leading in the direction of the driving. Pilings shall be placed plumb with out-of-plumbness not exceeding 1/8 inch per foot of length and true to line. Temporary wales, templates, or guide structures shall be provided to insure that the pilings are placed to the correct alignment.

Pilings properly placed shall be interlocked throughout their length with

SECTION 31 41 17 Page 6 adjacent pilings to form a continuous diaphragm throughout the length or run of piling wall.

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3.1.2.3 Driving

Pilings shall be driven with the proper size hammer and by approved methods so as not to subject the pilings to damage and to ensure proper interlocking throughout their lengths. Driving hammers shall be maintained in proper alignment during driving operations by use of leads or guides attached to the hammer. Caution shall be taken in the sustained use of vibratory hammers when a hard driving condition is encountered to avoid interlock-melt or damage to piling. The use of vibratory hammers should be discontinued and impact hammers employed when the penetration rate due to vibratory loading is 1 foot or less per minute. The work of using an impact hammer in such circumstances shall be at no additional cost to the Government. A protecting cap shall be employed in driving when using impact hammers to prevent damage to the tops of pilings.

Pilings damaged during driving or driven out of interlock shall be removed and replaced at the Contractor's expense. Pilings shall be driven without the aid of an air or water jet as directed by the Government's On-site Representative. Adequate precautions shall be taken to insure that pilings are driven plumb. If at any time the forward or leading edge of the piling wall is found to be out-of-plumb in the plane of the wall, the piling being driven shall be driven to the required depth and tapered pilings shall be provided and driven to interlock with the out-of-plumb leading edge or other approved corrective measures shall be taken to insure the plumbness of succeeding pilings. The maximum permissible taper for any tapered piling shall be 1/8 inches per foot of length.

The horizontal alignment of the steel sheet pile wall shall be within 1 inchof required location after completion of placement and after assembly and tightening of wales. Pilings in each run or continuous length of piling wall shall be placed alternately in increments of depth to the required depth or elevation. No piling shall be driven to a lower elevation than those behind it in the same run except when the pilings behind it cannot be driven deeper. If the piling next to the one being driven tends to follow below final elevation, it may be pinned to the next adjacent piling. If obstructions restrict driving a piling to the specified penetration, the obstruction shall, to the extent deemed practicable, be removed or penetrated with a chisel beam at no additional cost to the Government. Should boulders or other obstructions render it impracticable to drive a pile to the required tip elevation, the Contractor shall thereupon notify the Government's On-site Representative at the site and request direction. The Government's On-site Representative will determine any changes in design or alignment of the pile structure that may be necessary to insure the adequacy and stability of the structure. Upon notification of the Government's On-site Representative's findings and determination, the Contractor shall proceed with the work in accordance with the Government's On-site Representative's directive. Payment for the additional cost of any required changes will be made in accordance with applicable provisions of the CONTRACT CLAUSES.

Piles driven out of interlock with adjacent piles or otherwise damaged shall be removed and replaced with other piles and the removing and retrieving shall be at the Contractor's expense. After piles are driven to the required bottom elevation, the piles shall be cut off to the required top elevation as shown on the drawings, and all sharp edges shall be ground smooth. A tolerance of 1 inch above the indicated top elevation will be permitted.

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3.1.3 Cutting-Off and Splicing

Pilings shall be cut off to the required top elevation when driven to the point where additional penetration cannot be attained and are extending above the required top elevation in excess of the specified tolerance.

Pilings driven below the required top elevation and pilings damaged by driving and cut off to permit further driving, shall be extended as required to reach the top elevation by splicing when directed by the Government's On-site Representative. If splicing is required, payment will be made on a case by case basis, in accordance with CONTRACT CLAUSES. If directed by the Government's On-site Representative, pilings shall be spliced as required to drive them to depths greater than shown on the drawings and extend them up to the required top elevation. Pilings adjoining spliced pilings shall be full length unless otherwise approved.

If splices are allowed in adjoining pilings, the splices must be spaced at least 2 feet apart in elevation. Splicing of pilings shall be as indicated on the drawings. Should splicing of piles be necessary, the splice shall be made by an approved butt weld, making a full penetration of the pile section, or as otherwise directed or approved by the Government's On-site Representative. Ends of pilings to be spliced shall be squared before splicing to eliminate dips or camber. Pilings shall be spliced together with concentric alignment of the interlocks so that there are no discontinuities, dips or camber at the abutting interlocks.

Spliced pilings shall be free sliding and able to obtain the maximum swing with contiguous pilings. Piling cut-offs shall become the property of the Contractor and shall be removed from the site. The Contractor shall cut holes in pilings for bolts, as shown on the drawings or as directed. All cutting shall be done in a neat and workmanlike manner. A straight edge shall be used in cuts made by burning to avoid abrupt nicks. Bolt holes in steel piling shall be drilled or may be burned and reamed by approved methods which will not damage the surrounding metal.

3.1.4 Inspection of Driven Piling

The Contractor shall visually inspect the interlocked joints of driven pilings extending above the water surface. The underwater portion of each interlock, from channel bottom to water surface, shall be inspected by means of a surface controlled remote underwater television camera. Such inspection shall be viewable on a monitor on site as the inspection takes place and shall be digitally recorded. All video shall be clearly identified by interlock location and elevations. The originals of all digital recordings shall be delivered to the Government's On-site Representative at the completion of the recording. Pilings found to be out of interlock shall be removed and replaced at the Contractor's expense.

3.1.5 Pulling and Redriving

The Contractor shall pull selected pilings after driving to determine the condition of the underwater portions of pilings when directed by the Government's On-site Representative. The method of pulling shall be in accordance with the approved work plan. Any piling so pulled and found to be damaged to the extent that its usefulness in the structure is impaired shall be removed and replaced at the Contractor's expense. Pilings pulled and found to be in satisfactory condition shall be redriven when directed by the Government's On-site Representative and payment will be made on a case by case basis, in accordance with CONTRACT CLAUSES.

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3.2 CESSATION OF WORK

Whenever the work is discontinued for periods exceeding two (2) calendar days, the Contractor, before closing down operations, shall protect all the exposed partially completed work against damage. The Contractor's means and methods of providing such protection shall be as included in the approved work plan.

3.3 QUALITY CONTROL

3.3.1 Quality Control System

The Contractor shall establish and maintain a quality control system for all operations performed under this Section to assure compliance with contract requirements and maintain records of its quality control for all operations performed, including, but not limited to, the following:

a. Quality of Materials.

b. Testing.

c. Placement and support of piling: locations, horizontal and vertical alignment, splicing, welding, elevations, and interlocks.

d. Adequacy of protection against damage for partially completed work.

e. Pulling of piling for inspection and test.

f. Observance of safety regulations.

3.4 INSTALLATION RECORDS

Maintain a pile driving record for each sheet pile. Indicate on the installation record: installation dates and times, type and size of hammer, rate of operation, total driving time, dimensions of driving helmet and cap used, blows required per foot for each foot of penetration, final driving resistance in blows for final 6 inches, pile locations, tip elevations, ground elevations, cut-off elevations, and any reheading or cutting of piles. Record any unusual pile driving problems during driving. Submit complete records to the Contracting Officer.

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