汶川县城区某危岩体基本特征及稳定性分析评价  

The analysis of basic characteristics and stability to a dangerous rockmass in Wenchuan county

作　　者：杨林科[1] 孙书勤[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,成都610059

出　　处：《长春工程学院学报（自然科学版）》2012年第3期50-53,66,共5页Journal of Changchun Institute of Technology：Natural Sciences Edition

基　　金：国家自然科学基金(40972195);地质灾害防治与地质环境保护国家重点实验室自由探索基金(SKLGP2009Z009);西部交通科技项目(2009318000095)

摘　　要：在研究危岩所处的区域环境地质条件和危岩失稳诱发基础上,分析了危岩卸荷带的特征和各危岩单体的结构特征。采用赤平投影法和极限平衡法对该区2个代表性的危岩单体进行定性分析和定量评价。经分析,在暴雨和地震工况下均处于欠稳定或不稳定状态,并根据危岩单体的具体特征,提出了裂缝填埋、削方减载和清表喷锚的治理措施。Unstable rock instability is one of the frequent geological disasters after the ＂5.12＂earthquake.In this paper,on the basis of the study to the regional geological condition and unstable rock instability of dangerous rock zone,the author analyzes the unloading zone characteristics and the structural characteristics of the monomer dangerous rocks.The stereographic and limit equilibrium methods have been used to qualitatively and quantitatively analyze to two representative monomer dangerous rockmasses.As a result,they both rendered less stable or unstable state in heavy rain and seismic conditions.According to the specific characteristics of dangerous rockmass,it puts forward some control measures such as land filling the cracks,cutting side load shedding and clearing the table spray anchor.

关 键 词：危岩体 结构特征 稳定性分析 汶川县 

分 类 号：P642.2[天文地球—工程地质学]