Abstract: Xietan countryside sewage treatment plant slope of the three gorges reservoir area was selected for the study, and two-dimensional finite element model of the Xietan village sewage treatment plant slope was established. The fluid-structure interaction finite element analysis software (ABAQUS) and intelligent displacement back analysis method were adopted to dynamically inverse the physical and mechanical parameters of rock and soil of slope under the changing conditions of the reservoir water, which provided reasonable parameters for the evaluation of slope stability in the conditions of the water level fluctuations. The results show that: the calculated displacement values of measuring point based on the inversion to obtain geotechnical physical and mechanical parameters is very close to the measured values; using the fluid-solid coupling finite element analysis software (ABAQUS) and intelligent displacement back analysis to dynamically inverse reservoir slope of rock and soil physical and mechanical parameters in the project is feasible.

Key words: geotechnical engineering, fluid-solid coupling, intelligent inversion methods, parameter inversion

摘要： 选取三峡库区的泄滩乡污水处理厂变形体边坡为研究对象，建立了泄滩乡污水处理厂变形体边坡二维有限元模型，采用流固耦合有限元分析软件（ABAQUS）和智能位移反分析方法，对该边坡在库水变化条件下的岩土体的物理力学参数进行动态反演，为该边坡在库水位波动条件下的稳定性评价提供合理的参数。分析结果表明：基于反演获得的岩土体物理力学参数计算获得测点位置的位移值与实测值非常接近，说明采用流固耦合有限元分析软件（ABAQUS）和智能位移反分析方法在动态反演水库边坡岩土体物理力学参数在工程上是可行的。

关键词: 岩土工程, 流固耦合, 智能反演方法, 参数反演