Permeation grouting process simulation method and system based on near-field dynamics

A process simulation and dynamics technology, applied in the field of geotechnical engineering, which can solve the problems of few applications in the field of geotechnical engineering, difficulty in accurately describing the temporal and spatial evolution characteristics of grout, and lack of theoretical methods and calculation strategies for grouting reinforcement simulation.

Active Publication Date: 2020-12-18
SHANDONG UNIV
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Problems solved by technology

The inventors found that due to the problem that the viscosity of the slurry varies with time and space, it is difficult to accurately describe the spatiotemporal evolution characteristics of the slurry with the commonly used numerical methods; however, the peridynamics method has achieved remarkable results in th

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  • Permeation grouting process simulation method and system based on near-field dynamics
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  • Permeation grouting process simulation method and system based on near-field dynamics

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Embodiment 1

[0034] Such as figure 1 As shown, this embodiment provides a peridynamics-based simulation method for seepage grouting reinforcement process, which specifically includes:

[0035] S1: Initialize the relevant parameters of the infiltration grouting simulation model based on peridynamics;

[0036] Specifically, the infiltration grouting simulation model is discretized into a certain number of material points with rock mass material properties and rock mass volume information, and an appropriate neighborhood range δ is selected to construct the neighborhood matrix, coordinate matrix and material parameters of all material points Matrix; according to the model boundary conditions, initial conditions and constraints, initialize the model load matrix, pressure matrix and displacement matrix.

[0037] Preferably, the material point refers to a node representing the material volume and quality of rock mass within a certain spatial range; the node itself does not occupy a spatial volu...

Embodiment 2

[0073] This embodiment provides a permeation grouting process simulation system based on peridynamics, including:

[0074] The discretization module is used to discretize the seepage grouting simulation model into multiple material points according to the rock mass material and rock mass volume, and divide the seepage grouting process into multiple grouting time steps;

[0075] The solution module is used to construct a fluid-solid coupling cyclic model based on peridynamics. In the grouting time step, the displacement of the material point and the grout pressure are obtained by using a cyclic iterative solution method until the solution results meet the fluid-solid coupling equilibrium condition;

[0076] The cycle module is used to use the grout penetration radius of the current grouting time step as the initial condition of the next grouting time step, and add the material point strength and material point permeability obtained according to the grout remaining amount to the ...

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Abstract

The invention discloses a permeation grouting process simulation method and system based on near-field dynamics; and the method comprises the steps: discretizing a permeation grouting simulation modelinto a plurality of material points according to a rock mass material and a rock mass volume, and dividing a permeation grouting process into a plurality of grouting time steps; constructing a fluid-solid coupling circulation model based on near-field dynamics, and obtaining the displacement of a material point and the slurry pressure by adopting a loop iteration solving method in a grouting timestep until a solving result meets a fluid-solid coupling balance condition; and taking the slurry permeation radius of the current grouting time step as an initial condition of the next grouting timestep, adding the material point strength and the material point permeability obtained according to the slurry retention amount into the permeation grouting simulation process of the next grouting time step until the permeation grouting process is completed, and outputting the whole-process simulated permeation grouting. The time-space double-variation characteristic and the rock mass reinforcement effect are considered, and effective simulation of the rock mass permeation grouting reinforcement process is achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method and system for simulating a seepage grouting process based on peridynamics. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Grouting is a method of injecting some curable grout into rock and soil mass with appropriate methods, and improving the physical and mechanical properties of engineering rock mass by means of replacement, filling, extrusion, etc. Infiltration grouting refers to a method of injecting grout into rock and soil mass by infiltration under pressure, which is more suitable for sandy soil and cracked rock mass. At present, most of the grouting relies on engineering experience, the engineering design lacks rigorous theoretical basis, and the lack of systematic and comprehensive control methods in the ope...

Claims

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Application Information

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IPC IPC(8): G01N13/04G01N15/08
CPCG01N13/04G01N15/08
Inventor 李术才高成路周宗青李利平王利戈李卓徽耿阳商成顺魏车车
Owner SHANDONG UNIV
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