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

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. Keywords