高烈度地区滑坡治理工程效果对比研究--以巴郎村滑坡为例

Comparative Study on Landslide Prevention Project in High Cosmic Area——A Case of Balang County Landslide

西南地区地质条件复杂,受地质灾害影响最为强烈,加上近年来极端气候现象与地震频发,地质灾害防治工作面临着更多复杂因素作用下的难题。以高烈度地区发育的巴郎村滑坡为例,在现场详细调查的基础上,对其破坏迹象与变形机理进行了深入分析,计算了不同工况条件下的稳定性系数。在此基础上,针对高烈度地区滑坡治理工程优化设计开展了进一步研究,利用数值模拟方法对两套治理方案进行了耦合分析与计算,从合位移与剪应力分布两个方面,对比分析了抗滑桩与挡土墙支挡效果,证实在高烈度地区抗滑桩工程具有更好的支护效果。该研究成果对高烈度地区滑坡灾害的防治工作具有一定指导意义。

The southwest of China is one of the most affected areas by geohazards, where the complicated geo-logical condition exists and extreme climate and earthquake occurred more and more frequently in recent years. Nowadays, numerous complex problems have to be dealt with the potential landslide prevention and mitigation. The case of Balang county landslide was located in a high earthquake intensity area. Based on the detail investigation and analysis, the evidence of failure and deformation mechanism have been studied, as well as the stability analysis under different conditions. According to the results, numerical simulation method has been selected to model the two controlling projects coupled with cosmic condition from the two aspects ： deformation and shear stress. After the comparison analysis on treatment effect between anti-slide pile and retaining wall, the results show that anti-slide pile plays a better role in controlling landslide. The presented methodology could be useful for similar high cosmic area for landslide mitigation.