TM 5-818-1 AFM 88-3, Chap. 7
becomes necessary to construct a field p-e curve
e1 - e2
are also shown in figure 3-7. They are based on the
1 + e0
assumption that the straight lower branch of the field p-e
curve, K, intersects the laboratory curve at e = 0.4e0.
initial and final void ratios,
Furthermore, the field curve must pass through point a,
from the field
corresponding to the present overburden pressure and
the natural void ratio. The field compression index, Cc, is
corresponding to the initial and
taken as the slope of the straight lower branch of K on
the semilogarithmic diagram.
average initial void of the stratum
total thickness of the compressible
settlement, ∆H, of a foundation stratum is computed
stratum This formula also may be
used to estimate foundation
according to the following formula:
rebound due to excavation. When
the lower portion of
Figure 5-3. Influence value for vertical stress under a uniformly loaded circular area.