B09_Amd_03_Attach_04_32_62_17_Driven_Steel_Sheet_Piling_Rev_1_0003.pdf

10350902 National Park Service Replace Obsolete Stehekin Wastewater Treatment Plant - 100% Complete Contract Documents

DRIVEN STEEL SHEET PILING

31 62 17 - 1

SECTION 31 62 17

DRIVEN STEEL SHEET PILING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Steel sheet piling, steel sheet piling fittings including corners, tees, wyes, crosses, and points as applicable.

B. Related Specification Sections include but are not necessarily limited to:

1. Section 31 23 00 - Earthwork.

C. Unit Prices:

1. Measurement:

a. Measurement will be in projected square foot of sheet pile installed measured from tip to cut-off elevation and to the horizontal limits shown on the Drawings.

b. Sheet pile lengths extending above cut-off elevation will be considered as waste.

2. Payment:

a. No payment will be made for damaged or rejected sheet pile.

b. Contractor will be paid for sheet piles that are withdrawn or discontinued due to hitting obstructions.

c. Adjustment of base bid square footage shall be made in accordance with unit prices in the Proposal.

d. Adjustment will be made on the total square footage of sheet piling installed, not individual sheets.

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. American Institute of Steel Construction (AISC):

a. 325, Manual of Steel Construction.

2. ASTM International (ASTM):

a. A36/A36M, Standard Specification for Carbon Structural Steel.

b. A328/A328M, Standard Specification for Steel Sheet Piling.

c. F3125, Standard Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions.

3. American Welding Society (AWS):

a. D1.1, Structural Welding Code - Steel.

b. D1.3, Structural Welding Code - Sheet Steel.

B. Qualifications:

1. Sheeting installer must have, as a minimum, three successful past installations of sheet piling of comparable overall heights and sections and comparable penetration into soils similar to these found on the Project.

2. Be responsible for designing the sheet piling and the bracing system to adequately support all loads.

a. Design shall conform to the requirements of AISC 325.

1.3 DEFINITIONS

A. Installer or Applicator:

1. Installer or applicator is the person installing or applying the product in the field at the

Project site.

2. Installer and applicator are synonymous.

DRIVEN STEEL SHEET PILING

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1.4 SUBMITTALS

A. Shop Drawings:

1. Product technical data including:

a. Acknowledgement that products submitted meet requirements of standards referenced.

b. Manufacturer's installation instructions.

c. Complete list and description of materials for all construction components.

2. Documentation of qualifications required for sheeting installer.

3. Detailed design calculations of braced sheet piling support system including check of adequacy of existing sheet piling section.

a. Submittal for informational purpose only and will not be checked.

4. Information on the type of driving equipment to be used; including manufacturer of equipment, model number and driving energy to be used.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Sheet piling:

a. Skyline Steel Corporation.

b. Gerdau Ameristeel.

2. Sheet piling points:

a. Association Pile and Fitting Corporation.

2.2 MATERIALS

A. Steel Sheet Piling:

1. ASTM A328/A328M.

2. Piling sections shall be continuously interlocking.

3. Piling shall be reasonably free-sliding to grade when threaded.

4. Provide standard handling hole approximately 4 inches from one end.

B. Corners, Tees and Wyes:

1. As appropriate with ASTM A328/A328M piling.

2. Fabricated from matching pieces of sheet piling, ASTM A36/A36M plates or angles, and

ASTM F3125, Grade A325 high-strength bolts.

3. Bolts shall be furnished with washers.

C. Welding Electrodes: AWS D1.1 and AWS D1.3, E70 electrode.

PART 3 - EXECUTION

3.1 PREPARATION

A. Do not begin sheet pile installation until the earthwork in the area where sheet piles are to be driven has been completed to the extent that grade elevation is at or no more than 2 feet below the top of piling elevation as indicated on the Drawings.

B. Furnish lines and levels as required to install sheet piles at their indicated locations.

3.2 INSTALLATION

A. Use method to drive sheet piles that will not cause damage to nearby buildings or structures.

B. Install sheet piles straight and plumb and to the dimensions shown on the Drawings.

C. Drive sheet piles vertical at locations shown on the Drawings.

D. Provide additional length of sheet piling sufficient to allow cutting off the top of the sheet piling that may be damaged during driving and construction operations.

DRIVEN STEEL SHEET PILING

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E. Sheet piles shall be installed as one continuous member unless splices are permitted by Contracting Officer (CO).

1. Where splices are permitted, make splices by full penetration groove welding the entire cross sectional area of the piles at the splice location.

2. Perform welding using operators who have passed welding qualification tests during previous 12 month period prior to commencement of required welding.

3. Welding processes, procedures and welder qualification tests to be in accordance with

AWS D1.1 welding code requirements.

F. Accurately locate and drive sheet piles by such methods and equipment so as not to impair the sheet pile strength or damage sheet piles in any way.

G. Pre-drilling or jetting of sheet piling is not permitted.

H. Adequately support and hold sheet piles in correct vertical position during driving by means of adequate driving equipment.

I. Provide suitable driving heads to prevent damage to sheet pile ends.

J. Drive sheet piles with equipment capable of driving sheet piles to required final depth or resistance, without damaging sheet piles.

K. Should any obstruction including but not limited to boulders, rocks, rubble, existing foundations or timbers be encountered which prevent driving of sheet pile to its required final depth, threaten sheet pile damage or cause sheet pile to drift from required location horizontally, cease driving and take corrective action as directed by CO.

L. Should any sheet pile as determined by the CO be damaged or otherwise not conform to this Specification Section, withdraw sheet pile and drive another sheet pile in its place.

1. If it is impossible to withdraw damaged or rejected sheet pile, install additional sheet piles at locations indicated by CO.

2. Additional sheet piles shall be at Contractor's expense.

M. Damaged sheet piles include but are not necessarily limited to sheet piles bent, buckled, cracked, with fabrication tolerances beyond those indicated in ASTM A328/A328M, or with any other defect as determined by the CO would weaken the sheet pile.

N. Obtain cut off elevations from Drawings.

O. Drive sheet piling to piling elevation as determined by the Contractor’s sheet pile design engineer.

3.3 FIELD QUALITY CONTROL

A. Inspection:

1. Allow each pile installation to be witnessed by the Contractor’s Geotechnical Engineer who will determine that the required final driving resistance has been obtained and if necessary may revise the initially determined final driving resistance depending on driving conditions encountered.

END OF SECTION