摘要
三峡库区千将坪滑坡(约2.4×107 m3)发生于2003年7月13日,是三峡水库蓄水以来库区内发生的重大滑坡灾害之一。首先,基于对该滑坡发生后的追踪考察,介绍了滑坡的地理位置、地质环境及其发生、灾害应急监测等,阐述了滑坡典型的地质地貌特征,如滑坡簸箕状平面形态、滑坡边界、滑体内的纵张裂缝以及滑体结构等。其次,结合大量第一手资料,运用地貌学与工程地质力学等理论分析了千将坪滑坡的成因,认为滑体脆弱地质结构和集中降雨是滑坡的主要成因,而青干河水位上升与滑坡前部砖厂开挖则在一定程度上加速了滑坡的发生。最后,结合该滑坡的地质地貌现象,对库岸古(老)滑坡的野外鉴定方法进行了探讨。
Qianjiangping landslide （2.4×10^7 m^3）, which occurred in the Three Gorges Reservoir area on July 13, 2003, is one of the serious landslide disasters in this area after impounding. Also, it caused a serious loss of lives and property. According to the tracking survey on this landslide, quite a number of information about the landslide is obtained. This paper, firstly, introduces the location, geological background, occurrence and the emergency monitoring of the landslide, and elucidates its typical geologic and geomorphic characteristics, such as its plane shape of dust pan, boundary, longitudinal tensile crack in landslide body and geological structure and so on. Secondly, combined with the first-hand data, the origin of Qianjiangping landslide is analyzed by utilizing the theories of geomorphy and engineering geology mechanics. The result shows that the vulnerable geological structure of landslide body and concentrated rainfall mainly cause this landslide, while the rise of Qingganhe River and excavation accelerate the occurrence to some degree. Finally, the methods of field identifying of ancient （or old） landslide in reservoir area are discussed in term of the geologic and geomorphic characteristics of Qianjiangping landslide.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第17期3146-3153,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展规划(973)项目(2002CB412702)
中国科学院知识创新重点方向项目(KJCX2–SW–L1–1)
中国科学院工程地质力学重点实验室资助项目(04–6)
关键词
边坡工程
千将坪
新滑坡
滑坡成因
滑坡判据
slope engineering
Qianjiangping
new landslide
landslide origin
landslide criterion
