Research on Stability Analysis of Soft Foundation Slope and its Anti-Slip Pile Support Technology

2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA) Pub Date : 2021-11-12 DOI:10.1109/ISTTCA53489.2021.9654544

Q. Gao, Hongwei Wang, Z. Wan, Hongwei Liu, Risheng Huang, Haonan Wang

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Abstract

In this paper, a high fill soft foundation slope is taken as an example to analyze its stability by FLAC3D. The secondary slip surface of the slope is obtained, and the safety factor is 0.19. The main slip surface of the slope is obtained after the subgrade is converted into the applied load, and the safety factor is 0.61. The two are different because the safety factor is aimed at different objects, the former is the construction of high fill roadbed, the latter is the whole original slope. The length of the anti-slide pile is set as 16m, 17m, 18m, 19m and 20m. After calculation, it is found that the safety factor increases with the increase of the pile length, and the maximum shear force and maximum horizontal displacement of anti-slide pile both decrease with the increase of the pile length, and the change tends to be gentle when the pile length increases to 18m. Therefore, a pile length of 20m is chosen. A total of 16 anti-slide pile layout modes are set with longitudinal/transverse spacing of 5m, 10m, 15m and 20m, respectively.

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软土地基边坡稳定性分析及抗滑桩支护技术研究

本文以某高填方软基边坡为例，利用FLAC3D软件对其稳定性进行分析。得到边坡的二次滑移面，安全系数为0.19。将路基换算成外加荷载后得到边坡的主滑移面，安全系数为0.61。两者之所以不同是因为安全系数针对的对象不同，前者是施工高填方路基，后者是整个原边坡。抗滑桩长度设置为16m、17m、18m、19m、20m。经计算发现，安全系数随桩长增加而增大，抗滑桩的最大剪力和最大水平位移均随桩长增加而减小，且当桩长增加到18m时变化趋于平缓。因此，选择20m桩长。共设置16种抗滑桩布置模式，纵横间距分别为5m、10m、15m和20m。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)

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