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

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...

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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 the aspects of material damage and fracture, groundwater seepage, etc. It has a good research foundation, but it is rarely used in the field of geotechnical engineering, and there is still a lack of theoretical methods and calculation strategies suitable for geotechnical engineering grouting reinforcement simulation

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