某高速公路顺层软岩边坡开挖稳定性分析及支护方案研究

Excavation Stability Analysis and Supporting Scheme Study on An Expressway Soft RockBedding Slope

以贵州省某高速公路顺层边坡为例,在分析工程地质条件、开挖扰动的基础上,结合离散元软件UDEC,模拟了开挖后边坡在未支护及支护条件下的稳定性和变形特征。结果表明,边坡开挖后,在未支护情况下,会发生沿岩层面的滑移破坏;采用锚索支护后,边坡变形得到了较好的控制。最后,在考虑边坡变形特征、降雨影响等因素的基础上,提出了综合防治建议。研究结果对顺层软岩边坡开挖及支护方案的选择,具有一定参考价值。

The author taking an expressway bedding slope in Guizhou Province for an example,on the basis of analyzing the geological condition and excavation disturbance,and by using of the discrete element software-UDEC,the slope stability,deformation and failure characteristics are simulated.The results show that after the excavation and without any supporting,the slope will sliding along the rock level; after supporting by cable,the slope stability is relatively well controlled.Finally,on the basis of slope stability,deformation characteristics,rainfall and other factors,the comprehensive control proposal is put forwarded.The paper has a certain reference value to excavation and supporting scheme selection for soft rock slope.