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本文基于强度折减有限元法进行了边坡滑动破坏形式研究。通过选取不同的边坡土体粘聚力、内摩擦角,对边坡稳定进行了分析,结果表明坡顶与潜在滑移面塑性区中心的垂直距离随粘聚力增大而增大,边坡滑动破坏形式由浅层破坏转变为深层破坏,而内摩擦角对边坡破坏形式以及滑动块的影响规律恰好相反。采用有限元法模拟了土工袋表面加固边坡,结果表明边坡采用表面加固时,加固厚度超过一定值才能起增大边坡安全性的作用,加固后边坡潜在滑移面塑性区后移,往边坡深处发展。
In this paper, based on strength reduction finite element method, a study on the form of sliding failure is carried out. By selecting the cohesion and internal friction angle of different slope soil, the stability of the slope is analyzed. The results show that the vertical distance between the top of the slope and the center of the plastic zone of potential slip surface increases with the increase of cohesion The slip failure form changes from shallow failure to deep failure, while the influence of internal friction angle on the failure form of the slope and the sliding block is the opposite. Finite element method was used to simulate the reinforcement of the slope on the surface of geotextile bags. The results show that when the slope is reinforced by the surface, the reinforcement thickness exceeds a certain value to increase the safety of the slope. After the reinforcement, the plastic zone of the potential slip surface moves backward, To the depths of the development of the slope.