滑坡复活因素分析及其稳定性计算

Stability Analysis of the Reactivation of an Existing Landslide

以某山区滑坡为例分析了引起该滑坡复活的主要因素,并采用传递系数法计算该滑坡的稳定性系数。分析结果表明,引起该滑坡复活变形的因素主要可分为内因及外因,其中内因主要包括场地的地形地貌、岩土体结构及其物理力学性质等;外因主要包括降雨、沟渠的渗漏、建房加载等。该滑坡在不利的环境地质条件下,受人类工程活动和降雨的影响,再次形成滑坡。降雨对该滑坡的稳定性影响显得尤为显著,故该滑坡治理设计时应加强排水工程的布置,以减轻降雨对滑坡体稳定性的影响。通过研究可为相似滑坡的治理提供指导作用。

Factors that might trigger the re-activation of an existing landslide in mountain areas were examined and the factor of safety was obtained by using transferring coefficient method.The results indicate two categories of factors,which are internal factors and external factors,could attribute to the landslide re-activation.Mainly,under the unfavorable geological conditions,the landslide re-activation can be triggered by human activities and precipitations.Especially,the rainfall has the highest probability to trigger the landslide.Therefore,drainage facilities should be considered and installed in the landslide area.