普格县重点城镇斜坡结构类型划分及破坏模式探讨  

Disscussion on the Classification of Slope Structure Types and Different Failure Modes in the Key Towns of Puge County

作　　者：李浩宾[1] 冯文凯[1] 葛华[2] 徐伟[2] 吴刚[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]中国地质调查局成都地质调查中心,四川成都610081

出　　处：《水利与建筑工程学报》2015年第4期40-44,59,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(41172278);四川省教育厅重点项目(12ZA010);中国地质调查局地质调查工作项目-西南山区重点城镇地质灾害调查联合资助(12120113010300)

摘　　要：基于对该区域的岩组详细划分,结合高分辨率Worldview2卫星影像,使用Arc GIS软件生成1∶10 000大比例尺的斜坡结构分布图和灾害点的分布规律图,进行叠加分析,对典型滑坡的破坏模式进行详细剖析,研究结果表明:碎屑岩和第四系堆积物易引发地质灾害,其破坏模式以滑移-压裂或滑移-拉裂为主;斜坡结构为土质斜坡易引发地质灾害,土质类型斜坡主要沿基覆界面或松散堆积物中最软弱面滑下,其破坏模式多为牵引-推移,滑带多呈圆弧形,岩质斜坡结构规律不明显;通过对姚家山滑坡破坏模式进行详细剖析,得知该滑坡破坏机制是牵引-推移模式,并提出了该类型滑坡防治建议。Based on the detailed classification of rock groups and high-resolution satellite footage of Worldview2, the 1 ： 10000 large-scale slope map and hazard distribution chart were generated by adopting AreGIS. According to the overlay- ing analysis, the failure modes of typical landslide were discussed in detail. The results indicate that： fragmental rocks and Quaternary deposits cause geological disasters easily, and the main failure mode is slip-fracturing or slip-crack; on terms of the slope structures, the soil slopes are prone to geological disasters, they mainly slide down along the weakest plane of the base interface or loose deposits, and the failure mode is usually traction passage, the main slip surface is cir- cular arc, and the rock slopes do not follow any obvious law; through detailed analysis of Yaojiashan landslide, it is drawn that the failure mode is traction lapse, and some prevention recommendations are put forward regarding to this kind of landslides.

关 键 词：山区重点城镇 ARCGIS 斜坡 结构类型 破坏模式 

分 类 号：P642.22[天文地球—工程地质学]