基于PFC2D的柿子树坪滑坡变形特征模拟研究

柿子树坪滑坡近年来受雨季持续性降雨以及当地基础建设的影响,发生了多次小规模滑塌,目前滑坡威胁范围包括：村民33户156人,通村公路约320m。通过现场调查以及勘探结果,分析导致该滑坡发生变形的因素。根据不同工况下的滑坡稳定性的计算结果,借助PFC^2D软件对该滑坡的破坏过程以及变形特征进行模拟分析。结果表明,该滑坡在土体饱和状态下,首先发生蠕滑变形,并因自重作用的影响使得变形量的逐渐增加,坡脚处应力持续积累,最先出现剪出破坏,并不断向后发展,导致整体滑动,表现出典型的牵引式破坏。并在运动过程中呈现出前缘沿接触面发生滑移、坡顶出现张拉裂缝、中部锁固段剪断的阶段性变形特征。此研究结果与现场勘察结果相吻合,可为该滑坡的防治提供参考。

Deformation destroys simulation of shizishuping landslide based on PFC2D

In recent years, due to the continuous rainfall in the rainy season and the influence of local infrastructure construction, several small-scale landslides have been occurred on the shizishuping landslide, which currently threatens 33 households and 156 people, and the village road is about 320 meters, and the factors leading to the deformation of the landslide are analyzed through the site investigation and exploration results. According to the calculation results of landslide stability under different working conditions, the damage process and deformation characteristics of the landslide are simulated and analyzed with the help of PFC^2D software. The results show a phenomenon. The reason why firstly occuring creep-slip deformation, and the deformation gradually increasing by its weight, the stress at the broken foot accumulating abidingly by occurring damage. And the slope is constantly pulled backward, leading to overall sliding. During the movement, the three-stage deformation characteristic of "slip-tension-shear" is presented, i.e. the leading edge slips along the contact surface, tension cracks appear at the top of the slope, and the central locking section shears off. The research results are consistent with the field investigation results, which can provide reference for the prevention and control of the landslide.