15 AUGUST 2005
Excavation Plans. Develop excavation plans with the backfill operations and
the structure configurations in mind. The excavation and all completed structures within the
excavation should be conducive to good backfill construction procedures, and access should
be provided to all areas so that compaction equipment best suited to the size of the area can
be used. The plans for excavation should also provide for adequate haul roads and ramps.
Positive excavation slopes should be required in all types of soil deposits to facilitate
compaction of backfill against the slope and to ensure good bond between the backfill and the
excavation slopes. Remove loose material from the excavation slopes; in some case, benches
may be required to provide a firm surface to compact backfill against.
Figure 8-3.2 Confined Backfill Zones