Numerical simulation method suitable for valley width deformation of high arch dam

Abstract

The invention discloses a numerical simulation method suitable for valley width deformation of a high arch dam. The method comprises the following steps of firstly, the stratum information of a dam area is acquired, the landform and rock stratum distribution information is determined, and a geometric model of the dam area is established; secondly, an embedded discrete fracture model is establishedfor a discontinuous structural surface, and mesh generation is conducted on the geometric model by adopting orthogonal meshes; then piecewise linear fitting is conducted on the water storage processline, and the dynamic application process of the water load is determined; correcting the physical and mechanical parameters of the weak structural surface on the basis of considering the degradationeffect of water on the rock mass material; and finally, joint solution of embedded discrete cracks and an extended finite element model is carried out on the water storage process, and simulation of valley width deformation of the high arch dam in the water storage period is achieved. The method is advantaged in that the forms of the fault and the dislocation zone do not need to be considered during mesh generation, so complexity during mesh generation is greatly reduced; and secondly, generation of valley deformation of the high arch dam in the water storage period can be effectively simulated from the perspective of structural surface deformation.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a numerical simulation method suitable for valley width deformation of high arch dams. Background technique [0002] Faults, interlayer and intralayer dislocation zones are widely distributed in the formation, and almost all water conservancy and hydropower projects have weak structural planes of different scales. Valley deformation is a phenomenon in which the mountain deforms regionally to the riverbed due to the water storage of the reservoir under a specific geological background, and this deformation is a dynamic accumulation process. At present, different research methods have emerged in the study of valley amplitude deformation, mainly focusing on two aspects: (1) regression and inversion; (2) analysis from the perspective of load, without considering the deformation of weak structural surfaces. Although the phenomenon of valley deformation can ...

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Problems solved by technology

[0004] Purpose of the invention: In order to reveal the mechanism of valley amplitude deformation of high arch dams from the perspective of dislocation deformation of structural surfaces, and to overcome the problem of difficult mesh division of weak structural surfaces in existing numerical calculations, this invention proposes a method suitable for high arch dams Numerical Simulation Method of Valley Deformation

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