长江科学院院报2017，Vol.34Issue(5)：81-85,91,6.DOI:10.11988/ckyyb.20160396
基于模型试验的涉水堆积体岸坡变形-破坏模式研究
Model Test on Deformation and Failure Modes of Accumulation Slopeunder the Action of Reservoir Water
摘要
Abstract
In the aim of investigating the deformation and failure modes of water-involved accumulation slope,physical model test on accumulation slope was conducted under the action of reservoir water level fluctuation.A model test platform with the base plate adjustable was designed and manufactured independently.And the basic mechanical properties of soil samples collected from Three Gorges Reservoir were determined.Results show that slope gradient has significant influence on the characteristics of slope deformation and failure: large-scale bank collapse occurrs during the rise of water level when slope gradient is large (50° and 60°),and the deformation failure mode is water level raising→denudation and tunneling(←→) bank collapse→sinking platform→integral sliding→metastable state;whereas when the slope gradient is 40°,large sliding failure occurs during the water level drawdown,and the corresponding deformation failure mode is water level raising→slope settlement→ crack penetration→drop of water level→propagation of crack penetration(←→) formation of slip surface→global slip;when the slope gradient is small (35°),there is no obvious deformation and failure in many times of water level fluctuation cycle.关键词
涉水堆积体/边坡/库水作用/岸坡失稳/模型试验/破坏模式Key words
water-involved accumulation body/slope/action of reservoir water/slope instability/model test/failure mode分类
天文与地球科学引用本文复制引用
王乐华,徐义根,许晓亮,向力,章朝峰..基于模型试验的涉水堆积体岸坡变形-破坏模式研究[J].长江科学院院报,2017,34(5):81-85,91,6.基金项目
国家自然科学基金项目(51309141) （51309141）
水利部公益性行业科研专项经费项目(201401029) （201401029）
