| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 92 === ABSTRACT
Pile Foundations are often used to bearing construction loading in many kinds of engineering, and it can transfer the loading directly to stiff layer or rock ground. But the lateral bearing capacity of pile is always smaller than its vertical bearing capacity.
This research tended to improve the strength of soil surrounding the single pile to increase the lateral bearing capacity of pile. The research carried out a series of model pile tests, and tried to improve the shear strength of soil surrounding the pile by using cement, and compared the lateral displacement of model pile in treated and untreated soil.
The experimental results of model pile in treated sand indicated that with the cement content of 3 percent and the treated area with 6D in width of square and 4D in depth (where D is the diameter of pile), it can achieve a well improvement effect in reducing the lateral displacement of pile for 58 percent, and increasing 0.5 times the lateral bearing capacity of pile of untreated sand. The local improvement of soil surrounding the pile can increase the lateral bearing capacity of pile, and reduce the lateral displacement of pile effectively in the lateral loading conditions.
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