Research On The Caculation Method Of Bearing Capacity Of Anti-Slide Pile In Xigeda Rock

Xigeda landslide is one of the most adverse geological phenomenons along the Xichang-Panzhihua Speedway. The anti-slide pile, anchor part of which is in Xigeda rock, is widely used in landslide's governance. The nature of Xigeda rock is similar to very soft rock, but we have not worked out a clear and complete method to calculate anti-slide pile located in very soft rock in the present norms, and can not find the specialized research literature in this field. In order to find out the interaction mechanism between pile and soil in Xigeda rock and enhance the design level for anti-slide pile located in this stratum, this paper analyzes the pile-soil interaction mechanism via lateral static load test in Yonglang area. Doing this work is to seek a more factual distributed form about foundation resistance coefficient when Xigeda rock as a slide bed. Furthermore, the paper summarizes the distributed rule of the landslide thrust and proposes the distributed form of the landslide thrust in Yonglang area by measuring datas of several engineering piles. The main jobs in this paper are as follows:1. Situations about two test piles's scene of lateral static load test are introduced, collection and analysis of the results of the test are made. The "m" method and the constant method recommended by the norms are used in analyzing lateral load-bearing characteristics about two test piles, by doing so we can find how m and k change when the load changes, and a reasonable m and k are proposed in light of norms for the design of anti-slide pile in Xigeda rock. When Xigeda rock worked as anchor stratum, comparing the result of pile's internal forces by theoretical calculation with the measured in reality, it is advised that the state of foundation resistance coefficient is triangular.2. The stability of the landslide is evaluated under various operating conditions according to the soil parameters of slide body and slide belt. In view of the main component of slide body in Yonglang area is low liquid clay with gravel, the distributed form of landslide thrust is not known, so in this paper the various types of distributed form about this are summarized, and the theoretical calculation of the engineering pile is launched in combination with static load test results. Furthermore the paper summarizes the stress and deformation of the piles under various state of thrust, compares the results in different condition with each other and sums up the law. Carrying on the comparison between the theoretical calculation result of the pile's displacement and the measured result of pile's displacement, the following equation is suggested as the distributed form of landslide thrust in Yonglang area:...