TM 5-818-1 / AFM 88-3, Chap. 7
proach and in planning field and laboratory tests.
frequency, temperature, and soil type and condition. TM
(2) All design approaches require knowledge of
5-852-4/AFM 88-19, Chapter 4, discusses these
the response characteristics of the foundation materials,
properties for frozen ground.
e.
Design criteria for various specific
frozen or nonfrozen, under the particular load involved.
engineering features.
As dynamic loadings occur in a range of stresses,
In addition to the basic
frequencies, and types (shock, pulse, steadystate
considerations outlined in the preceding paragraphs of
vibrations, etc.), and the response of the soil varies
this chapter, the design of foundations for frost and
depending upon the load characteristics, the required
permafrost conditions requires application of detailed
data must be obtained from tests that produce the same
criteria for specific engineering situations. Guidance for
responses as the actual load. Different design criteria
the design of various specific features, construction
are used for the different types of dynamic loading, and
consideration, and monitoring of performance of
different parameters are required. Such properties as
foundation is presented in TM 5-852-4/AFM 88-19,
moduli, damping ability, and velocity of propagation vary
Chapter 4.
significantly with such factors as dynamic stress, strain,
18-12
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