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This thesis is an investigation of no larger change in the
coefficient of consoidiation of the frozen soil after
thawing. The soil selected for this studies are saline soils
which are popular in existence along the site of the coasts of
Taiwan. The testing soils are sampled from the site of
Taichung Fossil-fueled Power Plant ， Expansion Unit 2.
Because this construction project is located near the
seashore of Taichung Harbour ，the soils sampling contain
in nature of 1％ salt concentration. In addition ，these
salt-affected soils possess some amounts of the anode ions
(sodium- and magnesium-ions). Due to occurrence of the factors，
their influence to the coefficient of consolidation are also
included for studies. According to their physical properties，
we take four different soils for tests. The samples are : 1. No
salt soil. 2. The saline soil of 1％ salt concentration. 3. The
soil of 1％ sodium concentraction. 4. The soil of 1％ magnesium
concentraction. And from the testing results，we conclude that:
A. The coefficient of consolidation after thawing of these four
sampling soils are almost close. B. The coefficient of thaw
settlement Ａo varies with different soils ，it is examined
that the sodium soil has relatively larger value than the
regular soil. C. With temperature ranging from -15℃ to ambient
20℃,the void ratio will increase in all four sampling
soils. But the regular soil will have the largest increase
while the saline soil shows smallest increasing of void ratio.
A full knowledge of the behaviors on the consolidation by
freezing-thawing techniques will render a reasonable good
solution to the engineers dealing with construction and design
works.
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