Page 184 - Moving the Earth_ The Workbook of Excavation
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BASEMENTS
4.24 THE WORK
FIGURE 4.21 Cutting first level and ramp.
Cutting of the lower level proceeds in much the same way as for the upper, except that the
floor grade must be carefully watched. This is usually checked with a transit or a builder’s level.
If foot wall trenches below the floor level are required, they may be dug by hand immediately
after trimming of the wall is complete, and the spoil moved to the shovel by bulldozer or spread
on the pit floor.
A somewhat gentler ramp gradient could be obtained by using a diagonal or a zigzag ramp, as
in (D).
