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-
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.