工程地质学报2011，Vol.19Issue(2)：205-212,8.
强震条件下碎裂岩体崩塌机理及崩塌后壁对堆积体稳定性影响研究
ROCKFALL MECHANISM OF CATACLASTIC ROCK MASS AND INFLUENCE OF BACK WALL UPON THE STABILITY OF ACCUMULATION UNDER STRONG EARTHQUAKE
赵伟华 1黄润秋 1赵建军 1巨能攀 1李果1
作者信息
- 1. 成都理工大学,地质灾害防治与环境保护国家重点实验室,成都,610059
- 折叠
摘要
Abstract
The Wenchuan 8.0 earthquake triggered a huge number of rockf~ hazards. The hazards most happened in cataclastic rock inass. The respective stability of the back wall and the front accumulation of the slope and the influence of the back wall upon the stability of accumulation are problems that are faced by people after the earthquake. This paper takes the Ganhekou rockfalling accumulation as a example. It is based on analysis of the structure feature and genetic mechanism of the slope. It uses the 2D Discrete Element Method-UDEC to simulate the limit equilibrium theory based models and analyse the stability of accumulation before or after loaded by new substance generated by new rockfall. The results show that the genetic process of rockfalling accumulation can divided to stress redistribution, the formation of potential rockfall mass and rockfall induced by earthquake three phases. Before loading function, the accumulation is relatively stable both under nature or earthquake condition. But after considering the function of loading, it may fail under earthquake. The combined use of discrete element method and limit equilibrium method are practicable way for solving similar problem of similar slopes.关键词
强震/碎裂岩体/崩塌后壁/堆积体/稳定性Key words
Strong earthquake/ Cataclastic rock mass/ Rockfall back wall/ Rockfalling accumulation/ Stability分类
天文与地球科学引用本文复制引用
赵伟华,黄润秋,赵建军,巨能攀,李果..强震条件下碎裂岩体崩塌机理及崩塌后壁对堆积体稳定性影响研究[J].工程地质学报,2011,19(2):205-212,8.
