2010 Construction and Material Specifications - Ohio Department of ...

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503.08
503.08 Backfill. Backfill under this item includes all replaced excavation and
new embankment adjacent to structures. Use backfill embankment materials
conforming to 203.02.R, except behind the abutments below the approach slabs
use material conforming to Item 203 Granular Material Type B. Place and
compact the backfill materials according to 203.06 and 203.07, except as modified
by this subsection.
Do not place backfill material against any structural element until the Engineer
has approved the element.
In bridge abutment areas compact backfill material to meet the compaction
requirements in 203.07. Elsewhere, compact backfill material to 95 percent of the
maximum laboratory dry density.
When a test section method is used for compaction acceptance: Use
compaction equipment with a total weight or a centrifugal force of least 1 ton (0.9
metric tons). Supply the manufacturers’ information to verify this information.
Use at least six passes to construct the production areas. Use at least 97 percent of
the test section maximum dry density for acceptance of the production areas.
The Contractor does not have to place backfill material around piers that are not
within the embankment area or adjacent to a roadway or a railway in thin layers or
compact it, but should leave the backfill material in a neat condition with a
compensating allowance made for settlement.
Backfill in front of abutments and around piers to the ground lines shown on the
plans.
Backfill all structural foundation units as soon as practical after the required
conditions of this subsection are met to avoid the ponding of surface water and the
accumulation of debris. Simultaneously backfill in front of and behind abutments,
piers, wing walls, and retaining walls.
Carefully backfill against waterproofed surfaces to avoid damage to the
waterproofing material.
503.09 Method of Measurement. After the requirements of Items 201, 202,
and 203 have been met, the Department will measure excavation by the number of
cubic yards (cubic meters) as follows:
A. Bounded on the bottom. Bounded bottom plane of the footing, crossbeam,
or wall.
B. Bounded on the top.
1. In cut sections, by the surface of the remaining ground.
2. In fill sections:
a. If excavation is performed before embankment is placed, by the
surface of the original ground.
b. If excavation is performed after embankment is placed, by the
surface of the embankment.
C. Bounded on the sides.