Section 02361 STEEL SHEET PILING

Section 02361

STEEL SHEET PILING

PART 1 - GENERAL

_{1.1 THE REQUIREMENT}

A. This section covers only materials and installation of permanent hot-rolled steel sheet piling to be installed and left in place as part of the steel sheet piling utilized in the excavation of the building basement and tunnels and as protection system for pipelines and existing structures as indicated on the Drawings.

B. THE CONTRACTOR shall furnish all tools, equipment, materials, and supplies and shall perform all labor required to complete the Work as indicated in the Contract Documents and as specified herein.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Section 02164, Tieback Anchors

2. Section 02200, Earthwork

3. Section 02400, Geotechnical Instrumentation and Monitoring

4. Section 05120, Structural Steel

1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with current provisions of the following codes and standards:

1. ASTM A36 Standard Specification for Carbon Structural Steel

2. ASTM A572 Standard Specification for High-Strength Low-Alloy Columbium Vanadium Structural Steel – AASHTO No. M223

1.4 CONTRACTOR SUBMITTALS

A. Shop fabrication and field installation drawings for the steel sheet piling and fabricated piling accessories shall be prepared, checked, and submitted for review and acceptance as specified in the Submittals section. Certification that the furnished materials meet the specified material and strength requirements shall be submitted.

B. A complete description of pile installation equipment, including hammers, extractors, protecting caps, and other pile driving aids, shall be submitted to the ENGINEER for review and acceptance as specified in the Submittals section before beginning the Work.

C. CONTRACTOR shall prepare a complete installation sequence for installing the 96– inch GWR pipeline protection system. Submit to the ENGINEER for review as specified in the submittals section before beginning the Work.

PART 2 - PRODUCTS

2.1 MATERIALS

_{A. Materials for steel sheet piling shall meet the following requirements:}

1.	ASTM A572, Grade 50	Sheet Piling New Interlocking Piling Meeting
2.	ASTM A36 or ASTM A572	Shapes and Plates
3.	Corner Connectors	Hot rolled connectors as manufactured by sheet pile manufacturer or extruded connectors as manufactured by PilePro, LB Foster Or Equal.

B. The permanent sheet pile section indicated on the Drawings for the centrifuge building in Area 5 shall have a minimum flange thickness of 0.500 inch, a minimum web thickness of 0.480 inch, and minimum section modulus of 48.4 in.³/ft of wall or the thicknesses determined by the Engineer of Record for the shoring which ever is greater.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Installation of sheet piles with a vibratory pile hammer will not be permitted. Sheet piles shall be installed with an ABI Mobil ram or equals utilizing the press-in method. The hammer shall be adequate in size, strength, and capacity to install piles to the specified or otherwise required penetration without being subject to restrictions or other limitations of usage which will prevent compliance with the intent of this specification. Hammer carriages shall allow freedom of movement of the hammer while maintaining the hammer in axial alignment and preventing whipping of the sheet pile during driving. Methods of installation that cause vibration will not be permitted.

B. Equipment used shall be modern and maintained in first-class condition and shall operate at the efficiency and capacity required herein at all times. All equipment shall be acceptable to the ENGINEER.

C. Steel sheet piling shall be installed to the tip elevations indicated on the Drawings within a vertical tolerance of 0.16 inch per foot along the interlock. The sheet pile wall shall be true to the plan alignment indicated on the Drawings with a tolerance of 3 inches, plus or minus. Piles shall be placed as true to line as possible.

D. Suitable temporary walers, master piles, templates, or other guide structures shall be provided to drive the piles in the correct location and alignment.

1. Adjacent piles may be pinned together to prevent movement during installation of an adjoining pile.

2. Steel sections that are damaged during handling or driving or that are not interlocked shall be replaced.

E. Installation of sheet piling shall not impact adjacent utilities, structures and pavements.

1. Piles that encounter obstructions before reaching the required tip elevation shall have the obstructions removed by rotary drilling or other mechanical means acceptable to the ENGINEER.

2. Water jets and other commonly used pile driving aids shall not be used during installation.

3. All spaces around the piles created by the operations required to remove obstructions shall be filled with clean well graded sand.

4. All sheet pile sections damaged as a result of encountering obstructions shall be replaced.

F. Installation methods shall be adopted to existing subsurface conditions and for installation of sheet piling to full depth of penetration required, and to proper alignment and plumbness as specified herein, without damage to the sheet piling or rupture of its interlocks.

G. Installation methods of steel sheet piling shall be adapted to penetrate obstructions which may prevent the proper installation of sheet piling.

1. Sections of the pile shall be interlocked for the full length so as to form a continuous diaphragm throughout the length of each run of wall, bearing tightly against original ground.

H. Piles shall not be driven within 50 feet of concrete, grout, or jet grouting less than 7 days old.

3.3 DRIVING RECORDS

A. Driving record shall be kept by the CONTRACTOR and submitted in quintuplicate on forms satisfactory to the ENGINEER.

B. Data Recorded:

1. Data recorded shall include the following:

a. Project name and number.

b. Name of piling CONTRACTOR. c. Date of installation.

d. Sheet piling number and location. e. Point elevation.

f. Top elevation before cutoff. g. Top elevation after cutoff.

h. Pile installation equipment.

C. The ENGINEER shall have access to reports and records at all times during sheet piling installation.

1. All reports shall be signed daily in ink by the CONTRACTOR’s superintendent.

2. Certifications Required:

a. All data recorded shall be certified correct by the CONTRACTO