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本文研究了岳城水库土坝在库水位降落时坝体渗流和地震液化变形共同作用下的静力状况、动力状况和稳定情况。采用著名的加权剩余值法和等参数有限单元法,对坝体进行非线性静力分析和非线性有效应力动力分析。考虑了地震期振动孔隙水压力的产生及其随着时间的变化、振动残余变形及其随着时间的增长、震后孔隙水压力的消散与扩散,震后残余位移。用有效应力法对坝坡进行了稳定分析。文末列出一系列计算结果,并对该坝静力和动力稳定性进行了评价。建议了提高稳定性的措施。
This paper studies the static state, dynamic state and steady state of the Yuecheng reservoir earth dam under the joint action of seepage and seismic liquefaction deformation of the reservoir when the water level of the reservoir drops. The well-known weighted residual value method and isoparametric finite element method are used to conduct the nonlinear static analysis and the nonlinear effective stress dynamic analysis of the dam. Considering the generation of pore water pressure during the earthquake period and its change with time, the residual deformation of the vibration and its over time, the dissipation and diffusion of pore water pressure after the earthquake and the post-earthquake residual displacement. The effective stress method is used to analyze the slope stability. At the end of this paper, a series of calculation results are listed, and the static and dynamic stability of the dam are evaluated. Recommended measures to improve stability.