| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 84 === Installation of quicklime pile in soft cohesive soil
with high water content will result in a significant improvement
effects in the bearing capacity and compression. Besides, the
soil can be forced to drain to reduce the water content of soft
cohesive soil, and quicklime pile method can improve the lateral
earth pressure of the soil. The major principle of improvement
is due to certain chemical processes that cause soft cohesive
soil to coagulate, aggregate, and flocculate.
Doing a lot of model tests to understand the benefits of
improving softcohesive soil in thisstudy. According to the
results of laboratory experi- ments, it is understood that
mechanical and physical properties of soft cohe- sive soil
which had been improved; moreover, to realize the situation that
soil properties be changed with distance away from pile and
slaked time. In addition, the aim of the studyis to understand
the properties of quicklime pile that reduces the water
content of the soil around the quklime pile. Under the same
overburden pressure, using higher improving rate of volume
have more obvious improvement effects than increasing in density
of quicklime pile.
The soil which is closer to the quicklime pile will have higher
improvement effect in soil properties. As to reducing water
content of soft cohesivesoil, this study combined theory
analysis with different arragement of model piles to evaluate
the effects of improvement by the quicklime pile. Accordingto
the results, it is known that the evaluating fomula can evaluate
the abili-ty of reducing water content by quicklime pile
effectively.
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