地震工程学报Issue(4)：887-891,5.DOI:10.3969/j.issn.1000-0844.2014.04.0887
天水市水眼寨滑坡特征及稳定性分析
Characteristics and Stability Analysis of Shuiyanzhai Landslide in Tianshui City
摘要
Abstract
On the basis of the geologic investigation and field survey,this paper studied the main characteristics of the 2013 Shuiyanzhai landslide;analyzed the influence of terrain conditions,for-mation lithology,geologic structure,earthquake,rainfall,and human activities on the landslide;and calculated the dynamic landslide stability of the analyzed formation under the simulated action of static forces and different earthquake intensities using GeoStudio software and a variety of sta-bility evaluation methods.The results showed that the landslide originated in a giant loess of mud-stone tractive type.Landslide material and landslide mass have significant regionalization in the plane and stratification in profile.Stratum lithology and tectonic movement are the main internal causes,whereas rainfall and earthquake are important external causes.The landslide area is cur-rently in a steady state,but the stability can be reduced and even reactivated by environmental change in the future.The landslide is in a limited equilibrium state under a Ⅶ degree seismic ac-tion.Failures occurred in the region when horizontal peak ground accelerations (PGA)reached greater than 0.15 g.关键词
天水市水眼寨/滑坡特征/地震作用/稳定性Key words
Shuiyanzhai of Tianshui City/characteristics of landscape/seismic action/stability分类
建筑与水利引用本文复制引用
钟秀梅,王谦,张国信,袁中夏,车高凤,侯鹏博..天水市水眼寨滑坡特征及稳定性分析[J].地震工程学报,2014,(4):887-891,5.基金项目
地震科技星火计划项目(XH12046) （XH12046）
甘肃地震局科技发展基金项目(2012S01) （2012S01）
