506SHEET PILING

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of furnishing and placing permanent timber or steel sheet piling as shown on the plans or ordered.

Materials

2.1Steel sheet piling. The steel sheet piling shall conform to AASHTO M 202. Used steel sheet piling in good condition as

determined by the Department is acceptable. Construction Requirements

3.1Steel Sheet Piling.

3.1.1 The sections when assembled in place shall be practically watertight at the joints. 3.1.2 The tops of the piles shall be cut off to a straight line at the elevation indicated.

3.2Defective piles. The procedure incident to the driving of piles shall not subject them to excessive and undue abuse producing

deformation of the steel. Manipulation of piles to force them into proper position, considered by the Engineer to be excessive, will not be permitted. Any pile damaged by reason of internal defects or by improper driving, driven out of its proper location, or driven below the elevation fixed by the plans or by the Engineer shall be corrected at the Contractor’s expense. Method of Measurement

4.1Steel sheet piling will be measured by the pound.

4.2Only the lengths shown on the plans or ordered will be measured.

Basis of Payment

5.1The accepted quantity of piling will be paid for at the Contract unit price per pound for steel piling, as measured.

Pay items and units:

506.2Steel Sheet Piling Pound

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of the formation of embankments which are intended to support structures.

Materials

Structural fill shall consist of crushed gravel unless bank -run gravel, clean stone fill, or other material i s specified on the

plans or permitted by the Engineer. When not otherwise limited the word gravel as used below will refer to both bank -run gravel and crushed gravel. 2.1.1 Crushed Gravel for Structural Fill. 2.1.1.1 Required Grading:

Sieve Size Percentage by Weight Passing 3” 100 2” 95 - 100 1” 55 - 85 No. 4 27 - 52 No. 200 (Based on the fraction passing the No. 4 sieve) 0 - 12

2.1.1.2 At least 50 percent by weight of the materials retained on the 1” sieve shall have a fractured face. 2.1.2 Bank-run Gravel for Structural Fill. Bank-run gravel shall be graded as follows: 25 to 70 percent shall pass a No. 4 sieve. Not more than 15 percent of the portion which passes the No. 4 sieve shall pass a No. 200 sieve. No stone shall be included which cannot be incorporated in a 6” course. 2.1.3 Clean Stone Fill for Structural Fill. 2.1.3.1 Required Grading:

Sieve Size Percentage by Weight Passing 2” 100 1-1/2” 95 - 100 3/4” 35 - 70 3/8” 10 - 30 No. 4 0 - 5

2.1.3.2 At least 50 percent by weight of the materials retained on the 3/4” sieve shall have a fractured face. 2.1.4 Wear. The percent of wear of gravel or clean stone fill shall not exceed 50 percent as determined in accordance with AASHTO T 96.

2.2Concrete class F, flowable fill may be requested in writing as a substitute for structural fill. Approval in the form of a

supplementary agreement shall be in consideration of, but not limited to, differential frost heaving due to dissimilar materials, unit weight, structural requirements, lack of permeability, and damming resulting from water flow cut off. Construction Requirements

The area upon which the fill is to be constructed, regardless of the height of the proposed fill, shall be stripped of all loa m,

refuse, roots, stumps, boulders, and the like and shall be backfilled with the same type of material as that found at the sit e. All excavation shown on the plans or ordered shall be completed before constructing the fill. When fills are to be made on hillsides or when fill is built one half width at a time, the slopes of the original hillside or new fill shall be cut into or terraced as the work is brought up in layers. 3.1.1 Before the first layer of structural fill is placed, the entire work area of the original ground shall be compacted with approved compacting equipment.

Structural fill to be placed adjacent to new embankment material shall be placed concurrently with the embankment material

to obtain lateral support.