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青石滑坡是三峡水库岸坡消落带典型的崩坡积层滑坡,基于现场调查和工程勘察分析了三峡水库蓄水运行期间青石滑坡的变形与破坏特征;将滑动面位于175m水位以上的部分假定为弹性介质,位于145~175m之间的部分假定为应变软化介质,提出了两种介质材料的本构模型;通过对滑坡滑动面弹性应变能、滑坡重力势能和地下水渗透势能的计算,采用突变理论建立了滑坡破坏模式判别指标,据此可将滑坡破坏模式分为缓动型和剧动型两类。计算结果表明,青石滑坡在水库运行期间的破坏模式属于缓动型,与实情相符。研究成果对于探索三峡水库岸坡滑坡灾害的形成机制及其减灾具有积极意义。
Qingshi landslide is a typical landslide with landslide disintegrated on the bank of the Three Gorges Reservoir. Based on field investigation and engineering investigation, the deformation and failure characteristics of Qingshi landslide during the Three Gorges Reservoir impoundment operation are analyzed. The partial assumptions that the sliding surface is above 175m As the elastic medium, the part located between 145m and 175m is assumed to be the strain softening medium. Two kinds of constitutive models of the dielectric material are proposed. Based on the calculation of the elastic strain energy, the gravitational potential energy of the landslide and the potential energy of groundwater, The theory established the discrimination index of landslide failure mode, which can be divided into two kinds of slow-moving and revolving-type. The calculation results show that the failure mode of Qingshi landslide during the reservoir operation is of a slow-moving type, which is consistent with the actual situation. The research results have positive significance for exploring the formation mechanism of the landslide hazards of the Three Gorges Reservoir and its disaster reduction.