| Summary: | 碩士 === 國立中興大學 === 土木工程學系所 === 99 === The retaining piles accompanied with the construction of drainage system and anchor have been applied for slope stabilization since the early time, and there are a lot of cases and experiences accumulated. In general, the construction procedures of retaining piles are：firstly to construct the piles one by one, then combine the top of piles with tied beam, finally excavate step by step the ground in front of piles to minimize the risk of slope excavation to the least .
The mechanical behaviors of retaining piles are very complex, and the related references are not plenty enough. This research is aimed at the actual slope remediation executed currently in Keelung district. By using the Plaxis 2D numerical analysis program, the related mechanical behaviors of retaining piles for slope stabilization are studied under some various situations.
From analyzed results, it indicates that：
1. Because of shorten depth of the retaining piles, especially under the condition of soil softness and hydraulic pressure during the severe storm, the retaining wall will have a great lateral displacement, tilt and even destruction.
2. The lateral displacement of retaining wall can be properly restrained. When the embedded depth is increased. However, the internal action of retaining piles is not reduced due to the same exposed length.
3. The increase of pile diameter, seems not beneficial too. in the restraint of displacement and reduction of internal forces of retaining piles.
4. The application of prestressed ground anchor near the top of retaining piles is the most effective measure for enhancing the safety and stability of the retaining piles.
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