Art. 207.01 Porous Granular Embankment SECTION 207. POROUS GRANULAR EMBANKMENT
207.01 Description. This work shall consist of furnishing, transporting, and
placing porous granular material. For the purpose of this specification, the embankment may be above the original ground line, or it may be below the water elevation.
207.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Coarse Aggregate .............................................................................. 1004.05
b.Fine Aggregate .................................................................................. 1003.04 CONSTRUCTION REQUIREMENTS
207.03 General. The aggregate shall be placed in 6 in. (150 mm) lifts, loose
measurement, and compacted in a manner approved by the Engineer, except that if the desired results are being obtained, the compacted thickness of any lift may be increased to a maximum of 8 in. (200 mm).
207.04 Method of Measurement. This work will be measured for payment in
tons (metric tons) according to Article 311.08(b), or in cubic yards (cubic meters) compacted in place and the volume computed by the method of average end areas.
207.05 Basis of Payment. This work will be paid for at the contract unit price
per ton (metric ton) for POROUS GRANULAR EMBANKMENT, or at the contract unit price per cubic yard (cubic meter) for POROUS GRANULAR EMBANKMENT. SECTION 208. TRENCH BACKFILL
208.01 Description. This work shall consist of furnishing aggregate for
backfilling all trenches made in the subgrade of the proposed improvement, and all trenches where the inner edge of the trench is within 2 ft (600 mm) of the proposed edge of pavement, curb, gutter, curb and gutter, stabilized shoulder, or sidewalk. This work also includes the disposal of the surplus excavated material which is replaced by trench backfill. Such disposal shall be made according to Article 202.03.
208.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Fine Aggregate (Note 1) .................................................................... 1003.04
b.Coarse Aggregate (Note 2) ................................................................ 1004.05 Note 1. The fine aggregate shall be moist. Note 2. The coarse aggregate shall be wet. Porous Granular Backfill Art. 209.04
208.03 Method of Measurement. This work will be measured for payment as
follows.
a.Contract Quantities. The requirements for the use of Contract Quantities shall conform to Article 202.07(a).
b.Measured Quantities. Trench backfill shall be furnished for backfilling to the full width of the trench. It will be measured in cubic yards (cubic meters) in place, except that the quantity for which payment will be made shall not exceed the volume of the trench as computed by using the maximum width of trench permitted by the Specifications and the actual depth of the completed trench backfill above the center of the pipe, with a deduction for the volume of one-half of the pipe. Any material conforming to the requirements of Articles 1003.04 or 1004.05 which has been excavated from the trenches shall be used for backfilling the trenches. No compensation will be allowed as trench backfill for the portion of the trench backfilled with excavated material.
208.04 Basis of Payment. This work will be paid for at the contract unit price
per cubic yard (cubic meter) for TRENCH BACKFILL. SECTION 209. POROUS GRANULAR BACKFILL
209.01 Description. This work shall consist of furnishing and placing porous
granular material for backfilling tile or pipe in trenches.
209.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Coarse Aggregate .............................................................................. 1004.05
b.Fine Aggregate .................................................................................. 1003.04 CONSTRUCTION REQUIREMENTS
209.03 General. The porous granular material shall be placed around the tile
or pipe for the full width of the trench. This material shall be carried to the top of all water bearing strata intercepted by the trench or to a minimum of 1 ft (300 mm) above the tile or pipe, as directed by the Engineer. The material shall be placed in lifts not exceeding 6 in. (150 mm) in thickness and compacted in a manner approved by the Engineer. The balance of the trench shall be backfilled with approved natural soil. Surplus excavated material shall be disposed of according to Article 202.03.
209.04 Method of Measurement. Porous granular backfill will be measured
for payment in cubic yards (cubic meters) in place, except that the quantity for which payment will be made shall not exceed the volume of the trench as computed by using the maximum width of trench permitted by the Specifications and the actual depth of the completed porous granular backfill above the invert of the pipe, with a deduction for the volume of the pipe. Any porous granular backfill used for the
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 111–112 of 1,217. View official source ↗