粉质黏土边坡稳定性分析及处置技术研究

Stability Analysis and Treatment Technology Research of Silty Clay Slope

粉质黏土在我国各个地区均有不同程度的分布,其中西北地区分布尤其广泛。由于粉质黏土特殊的构成与化学成分,整体软化程度较高,若遇到较大降水,极易发生坍塌事故。因此,加强对粉质黏土的稳定性研究显得十分重要。本文借鉴刚体的极限平衡理论相关方法,对我国北部地区的粉质黏土边坡稳定性进行分析,同时运用FLAC 3D的数值模拟方法,在暴雨情景下进行仿真分析。研究表明,一般情况下,粉质黏土的稳定性较高;但在暴雨情景下,尤其是长时间遭受水流冲击时,黏土的抗剪能力减弱,边坡稳定性明显下降,滑坡风险明显上升。最后针对这类问题提出了整改措施。

Silty clay is widely distributed in my country,with varying degrees of distribution in various regions,espe⁃cially in Northwest China.Due to the special composition and chemical composition of silty clay,the overall softening degree is relatively high.If it encounters heavy rainfall,IT is very prone to collapse accidents,so it is very important to study the stability of silty clay.This paper draws on the relevant methods of the limit equilibrium theory of rigid bodies to analyze the stability of silty cohesive slopes in northern my country,and at the same time uses FLAC3D nu⁃merical simulation methods to perform simulation analysis under heavy rain scenarios.Studies have shown that under normal circumstances,the stability of silty clay is relatively high.However,under heavy rain scenarios,especially af⁃ter prolonged exposure to water currents,the shear resistance of the clay is weakened,the stability of the slope is sig⁃nificantly reduced,and the risk of landslides is significantly increased.In response to such problems,rectification measures have been proposed.