长江科学院院报Issue(12)：87-92,119,7.DOI:10.11988/ckyyb.20140561
三峡库区水位变化对树坪滑坡变形影响机制研究
Influence Mechanism of Deformation of Shuping Landslide in Three Gorges Reservoir Area Under Water Level Variation
摘要
Abstract
After impoundment of the Three Gorges reservoir,numerous landslides relevant to water have the signs of deformation.Deformation of most landslides rapidly increases,especially in the process of decline of reservoir water level.Shuping landslide,about 47 km from the dam site of Three Gorges,belongs to a kind of giant ancient accu-mulation body.Monitoring results for several years showed that Shuping landslide strongly deformed when reservoir water level dropped,significant losses will occur if the landslide loses stability.In light of the problem,we collect-ed monitoring data of Shuping landslide in recent years and analyzed its deformation mechanism in association with geological survey and exploration data.The results show that:1 )the fluctuation of underground water level of Shuping landslide is consistent with that of reservoir water level,but the variation of reservoir water level is relative-ly lagged;2)hydrodynamic pressure occurs in the condition of decline of reservoir water level,which is unfavor-able to landslide stability,at the same time,GPS data indicate intense deformation of the landslide with typical fea-tures of hydrodynamic pressure-type landslide;3)monitoring results measured by auto-recording displacement me-ter show that overall deformation is the main kind of deformations for Shuping landslide after impoundment with wa-ter level of 175 m,and it has deformation features of tractive landslide whose deformation in the bottom leads to slip in the top.关键词
树坪滑坡/滑坡监测/动水压力/变形机制/三峡库区Key words
Shuping landslide/landslide monitoring/hydrodynamic pressure/deformation mechanism/Three Gor-ges reservoir分类
天文与地球科学引用本文复制引用
王力,王世梅,向玲..三峡库区水位变化对树坪滑坡变形影响机制研究[J].长江科学院院报,2015,(12):87-92,119,7.基金项目
国家自然科学基金面上项目 （）
