TM 5-818-5/AFM 88-5, Chap 6/NAVFAC P-418
Figure 2-9. Sand drains for dewatering a slope.
underlain; potential damage resulting from failure of
(3) Labor requirements.
the dewatering system; and the cost of installation and
(4) Duration of required pumping.
The rapid development of slurry cutoff walls has made
operation of the system. The cost of a dewatering
this method of groundwater control, combined with a
method or system will depend upon:
certain amount of pumping, a practical and econom-
(1) Type, size, and pumping requirements of proj-
ical alternative for some projects, especially those
ect.
where pumping costs would otherwise be great.
(2) Type and availability of power.
U.S. Army Corps of Engineers
Figure 2-10. Electra-osmotic wellpoint system for stabilizing an excavation slope.
2-9
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