TM 5-818-5/AFM 88-5, Chap 6/NAVFAC P-418
U.S. Army Corps of Engineers
Figure 2-8. Deep wells with auxiliary vacuum system for dewatering a shaft in stratified materials.
2-10. Selection of dewatering system.
id enlargement of a fault (unfrozen zone) with conse-
quent serious trouble, which is difficult to remedy.
a. General. The method most suitable for dewater-
ing an excavation depends upon the location, type,
size, and depth of the excavation; thickness, stratifica-
2-9. Summary of groundwater control
tion, and permeability of the foundation soils below
the water table into which the excavation extends or is
methods discussed in this section is given in table 2-1.
2-8
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