某施工诱发牵引式滑坡的稳定性分析及防治

The Stability Analysis and Prevention of a Retrogressive Landslide Induced by Construction

摘要: 牵引式边坡滑坡是高速公路建设中常遇到的边坡灾害类型之一。K7滑坡为一发生于贵州省江口至瓮安高速公路境内的中型滑坡，是由于工程建设而引发的牵引式滑坡。基于工程地质分析法，对该滑坡的工程地质条件、滑坡稳定性影响因数及破坏机制进行了分析，通过计算该滑坡的稳定性系数及定量地评价开挖及降雨对滑坡稳定性的影响，得出该滑坡在开挖及降雨作用下处于不稳定状态，且开挖和降雨都会对安全系数及稳定性状态产生较大的影响。并对该滑坡采取了抗滑桩、排水、封闭坡体裂缝相结合的加固措施。通过监测表明，K7滑坡原因分析正确，综合治理方案合理。

Abstract: Retrogressive landslide is one of the common types of slope disaster in the highway construction. K7 landslide caused by engineering construction is a medium landslide which occurred in highway of Jiangkou to Weng’an in Guizhou province. Based on the engineering geology analysis, the engineering geological conditions of the landslide, the landslide stability influence factor and failure mechanism was analyzed. Furthermore, we calculated the landslide stability coefficient and evaluated the influence of excavation and the rainfall on landslide stability quantificationally, coming to the conclusion that excavation and rainfall had great influence on state stability and the stable factor of the landslide , and the excavation and rainfall will larger influence on safety coefficient and stability state. And we took the comprehensive management measures including anti-slide pile, drainage, closing the cracks of the slope and so on to treat the landslide. The monitoring results show that the cause analysis of the K7 landslide is correct, and the comprehensive treatment scheme is reasonable.