某山区公路滑坡分析及治理策略分析

针对山区公路特殊的地质条件及复杂结构,容易引起公路滑坡的问题。以某一山地高速公路为实例,采用传递系数法和FLAC 3D方法对天然状态(自重条件)和饱和状态(自重状态+暴雨状态)下的公路滑坡进行稳定性分析,并提出滑坡治理方案。研究表明:传递系数法和FLAC 3D数值模拟法下获得天然状态下滑坡的稳定系数值均在1.06附近,滑坡处于基本稳定状态;饱和状态下的滑坡稳定系数值在0.92附近,处于不稳定状态。针对饱和状态的不稳定性,提出采用削坡法和布设抗滑桩法两种防治方案。对两种滑坡质量方案进行模拟分析表明:削坡法经济有效,但易引起上级滑坡,造成二次灾害,布设抗滑桩法花费高,工程量大,对滑坡稳定性效果显著,实际施工中根据山体高速公路的具体路面情况选择合适的抗滑桩参数。

Analysis on Landslide Control Strategy of a Mountain Highway

In view of the special geological conditions and complex structure of mountain highway,it is easy to cause the problem of highway landslide.a mountain expressway is used as an example to analyze the stability of highway landslides in natural state(deadweight condition)and saturation state(heavy rain state of deadweight state)by using the transfer coefficient method and FLAC 3D method,and a landslide control scheme is proposed.According to the results of the study,the stability coefficient of the landslide in the natural state is similar FLAC 3D the transfer coefficient method and the numerical simulation method.in an unstable state.In view of the instability of saturated state,two prevention schemes of slope cutting method and anti-slide pile method are proposed.The simulation results show that the slope cutting method is economical and effective,but it is easy to cause the superior landslide and cause the secondary disaster.