Simulation method for film formation value of mud of slurry shield machine

A numerical simulation, shield machine technology, applied in the direction of electrical digital data processing, special data processing applications, surface/boundary effects, etc., can solve the problem of inability to describe the relationship between the particle size of mud fine particles and the pores of skeleton particles, and the inability to simulate mud infiltration or film forming process, etc.

Inactive Publication Date: 2014-08-27
HOHAI UNIV
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Problems solved by technology

When using finite element or difference method to simulate grouting, it is impossible to describe the relationship between the particle size of fine particles in the mud and the pores of skeleton particles, so it is

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  • Simulation method for film formation value of mud of slurry shield machine
  • Simulation method for film formation value of mud of slurry shield machine
  • Simulation method for film formation value of mud of slurry shield machine

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and / or groups thereof....

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Abstract

The invention discloses a simulation method for the film formation value of mud of a slurry shield machine. Through combined usage of a granular distinct element method and a computational fluid dynamic method, a skeleton particle model and a two-phase medium mud model according with Bingham fluid characteristics in skeleton pores are established, and simulation of a film forming experiment of mud is carried out. Meso-structure parameters are obtained through laboratory test, composition of tunnel face skeleton particles is simulated, composition of fine particles in mud is simulated, grouting pressure boundary conditions are applied, value simulation is carried out, and whether a mud film is formed in the tunnel face skeleton particles is determined in a microscopic view. According to the invention, improvement measures can be brought forward to preparation of slurry according to simulation results, so a film forming effect is improved and the method is of guidance meaning to practical engineering.

Description

technical field [0001] The invention relates to a numerical simulation method for mud film formation of a mud-water shield machine, in particular to a numerical simulation method for mud film formation of a mud-water shield machine which combines particle discrete elements and computational fluid dynamics methods, and belongs to fluid-solid coupling analysis technology in geotechnical engineering field. Background technique [0002] With the development of cities along the middle and lower reaches of the Yangtze River across the river, there has been an upsurge in the construction of large-scale cross-river tunnels in my country. Slurry shields are favored for their wide range of applicable geology and high stability of excavation surfaces. The mud-water shield uses pressure mud to support the excavation surface. The formation of mud film is very important for the stability of the excavation surface. Especially in high permeability formations, the mud can easily penetrate th...

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Application Information

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IPC IPC(8): G01N13/04G01N11/00G06F19/00
Inventor 倪小东赵帅龙王媛
Owner HOHAI UNIV
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