摘要
在库水位的反复变动下,水库滑坡表现出来的阶段性变形特征往往是预警预报的现实依据。以三峡库区簸箕石滑坡为例,在充分认识其地质原型基础上,开展了滑坡岩土物理力学试验。根据相似理论合理选择相似材料,并建立室内滑坡地质力学模型,设计符合原型地质环境条件的两个过程,对滑坡变形特征进行定量研究。结果表明:该滑坡的变形破坏具有突发性,前缘先出现变形,中后缘同时失稳。变形速率有先增大后逐渐减缓的规律,无明显征兆。
Reservoir landslide is different from other mountain landslides. The stability is obviously influenced by the fluctuation of water level of the reservior. Changes in water level often induce landslides. Under the changes in water level,the landslide shows periodic deformation characteristics,which are regarded as the realistic basis of early warning forecast. Due to the particularity and importance,researches on the deformation characteristics and prediction of reservoir landslides have become the focus and difficult points. This paper uses the setting of Bojishi landslide near the Three Gorges Dam as an example. On the basis of understanding its geological prototype,the rock and soil physical and mechanical test of the landslide are conducted. The suitable similar material is chosen on account of similarity theory,and its geological mechanical model in laboratory is established. Two processes are designed which conform to the prototype geological environment.The deformation behavior of the landslides is quantitatively studied. The results show that the deformation of landslide is of abruptness,which appears at the leading edge priority,and then at the center and margin.Deformation rates first increases and then decreases without any obvious signs.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2014年第5期107-112,共6页
Hydrogeology & Engineering Geology
基金
三峡库区三期地质灾害防治监测预警工程滑坡预报模型和预报判据建立(20081218)
关键词
簸箕石滑坡
水库滑坡
物理模拟
降雨
变形特征
Bojishi landslide
reservior landslide
physic simulation
rainfall
deformation behavior
