TM 5-818-1 / AFM 88-3, Chap. 7
Table 11-1. Excavation Protection-Continued.
Soil Type
Identification
Problems and Mechanism
Preventative Measures
Soft, normally
(1) Recently deposited, or
(1) Primarily low
Provide support, and prevent
consolidated
no geologic loading
strength, unable
remolding: place timber
or sensitive
and unloading
to support const.
beams under heavy
clays
(2) Leached marine clays
equipment
equipment; cover
(3) Natural water content
(2) Remolded by con-
excavation bottom with 1' -
near or above liquid
struction activ-
2' of sand and gravel fill
limit
ity, causing
and/or 6" - 8" of lean
strength loss
concrete
(Sheet 3 of 3)
11-8
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