Page 244 - Moving the Earth_ The Workbook of Excavation
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DITCHING AND DEWATERING
5.46 THE WORK
FIGURE 5.34 Subsurface drainage patterns.
pushed to the bottom. The porous material is placed to the desired height, the fabric is folded over
the top, and backfilling is completed.
This cloth sifts most dirt particles out of water entering the drain.
French drains are used chiefly where supplies of suitable material are abundant.
Moles. Certain types of stiff plastic soils may be drained by opening pipelike channels in the soil.
This is done by attaching a mole, which is a metal piece shaped like an elongated egg, to the heel of
