Soil body internal erosion deformation response simulation method

Abstract

The invention discloses a soil body internal erosion deformation response simulation method which comprises the following steps of: S1, collecting a soil body sample, constructing a numerical simulation sample model, and pressurizing and solidifying the numerical simulation sample model according to the actual stress state of a soil body; S2, calculating a stress reduction coefficient of each fine particle in the numerical simulation sample model; S3, generating a stress reduction coefficient statistical distribution diagram of the fine particles in the numerical simulation sample model; S4, calculating a stress reduction coefficient critical value of erosion of the fine particles in the soil body sample, and determining the total erosion amount of the fine particles; S5, determining an erosion deformation sample model; S6, determining strength characteristics and deformation characteristics of the erosion deformation sample model; and S7, taking the erosion total amount of the fine particles, the strength characteristics and the deformation characteristics as results of soil internal erosion deformation response simulation. According to the method, the erodible particles are judged based on the stress state of the particles and a hydraulic gradient to be applied, and the actual erosion condition is met.

Description

technical field

[0001] The invention belongs to the technical field of simulation of soil erosion response, and in particular relates to a simulation method of soil internal erosion deformation response. Background technique

[0002] As one of the main forms of instability of earth-rock dams and dams, seepage failure often occurs in poorly graded cohesionless soils. Under the action of seepage damage, the fine particles in poorly graded cohesionless soil are easily eroded by water flow, which affects the physical and mechanical properties of the soil, and even leads to the destruction of the soil structure. Quickly determine the erosion characteristics of poorly graded cohesionless soil materials under the action of different seepage fields, and conduct effective simulation and analysis of their post-erosion responses, which are important for seepage safety assessment and emergency treatment of dam foundations and dams. meaning.

[0003] Reasonably determining the erosion ...

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