镇坪县宝塔梁崩滑体成因分析

BAOTALIANG LANDSLIDE MASS IN ZHENPING COUNTY

镇坪县宝塔梁崩滑体形成于1987年，2008年2月发生强烈变形，裂缝由原来的1～2条变为多条，裂缝长度最长的100m以上，裂缝宽度达1．2m，多条裂缝贯通，最大可见深度2m左右，裂缝两侧相对位移最大1．6m，陷落深度达1．2m；崩滑体前缘的崩塌面宽度由原先的数米宽增至60-70m，且向陡崖上部延伸发展，崩滑堆积物由原有的数百方增至数千方，陡崖不断地垮塌；到3月5日，滑塌体变形减缓。本文从地质条件、地质构造、地形地貌、水文地质、人类工程活动及气候条件等几方面，对该崩滑体形成的原因进行了分析。

The Baotaliang landslide mass in Zhenping County formed in 1987, on which in February 2008, intense deformation occurred, resulting in the increase of fissures from 1-2 to more with the longest fissure over 100 m and a width about 1.2 m. Most of the fissures linked each other with a visible depth about 2m, the largest relative displacement about 1.6m and slump depth about 1.2m. The width of slump surface at the front margin of slump mass increased from original several meters to 60 - 70m and extended upward to the top of cliff. The volume of collapsed accumulation expands from several hundreds cubic meters to several thousands cubic meters. The deformation of the landslide mass slowed down till to 3rd of May. In this article, the genesis of the landslide mass is analyzed based on geology, tectonics, landform, geomorphology, hydrogeology, and human engineering and climate changes.