TM 5-818-1 / AFM 88-3, Chap. 7
sequence should be simulated in consolidation tests by
preconsolidation stresses. Curves designated Ku in
loading the specimen to the existing overburden
figure 3-7 are laboratory p-e curves. Soil disturbance
during sampling affects laboratory p-e curves so that it
pressure po, unloading to the estimated stress after
usually
excavation pexc, and reloading the specimen to define the
p-e curve at loads in excess of overburden and
U. S. Army Corps of Engineers
Figure 5-1. Vertical stress beneath a uniformly loaded rectangular area.
5-5
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