TM 5-852-4/AFM 88-19, Chap. 4
Table 4-4. Allowable Design Cohesive Stress for Saturated Frozen Soil in T/ft2 on Basis of Ultimate Strength.
The values for stress shown include a safety factor of 2.0. The stress values should only be used where
cohesion is the sole factor involved.
Critical (highest) temperature of frozen
soil beneath base of the
U. S. Army Corps of Engineers
foundation
310F
290F
150F
Frozen Soil
25F
87
(20-30)
1.0
2.5
4.5
10.0
Saturated Ottawa sand
87
Manchester fine sand
(Saturated uniform fine sand)
1.0
2.0
3.5
6.0
Hanover silt
(Saturated silt, ML, non-plastic,
no visible ice lenses, w 35%)
(Unpublished CRREL data) -
0.6
1.5
3.0
5.5
Suffield clay
(Saturated clay, CL; LL 35, PL 20;
no visible ice lenses, w < 40%)
(Unpublished CRREL data)
0.5
1.0
2.5
5.0
4-79
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