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摘要
This paper focuses on the stability of arch dam abutment with interlayer shear zones, presents the experimental analysis on Lizhou Arch Dam, and implements comprehensive method by combining geo-mechanical model test with the finite element method to analyze the impact of interlayer shear zones on the stability of dam abutment. Firstly, 3D geo-mechanical model test is conducted and the model shows the impact of interlayer shear zones on stability of arch dam. According to the deformation behaviors and eventual failure form of rock mass and structure planes in dam abutment and dam foundation, the impact of interlayer shear zones unstable failure on the safety coefficient of arch dam is analyzed. Secondly, the FEM (Finite Element Method) is used for supplementary verification. As a conclusion of the analysis: Interlayer shear zones fj1 - fj4 are developing towards riverbed in the rock mass of the dam abutment of Lizhou Arch Dam, cutting through the rock mass of dam abutment and forming a bottom slide face. In the dam abutment, fault f5 and fracture Lp285 have developed and formed a side fracture plane by intersecting the interlayer shear zone. Under the effect of the resultant force of the arch abutment, with the interlayer shear zone of inferior properties as the bottom slide face, the rock mass of dam abutment slides out in the form of steps or drawers, and the stability of the dam and the foundation is influenced.
- 出版日期2016-9
- 单位郑州大学
