Diffusion frontal surface curtain grouting numerical simulation method based on cement slurry thixotropy and VOF calculation

A technology of cement grout and curtain grouting, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., to achieve the effect of small calculation workload, small data storage, and easy calculation convergence

Active Publication Date: 2017-02-22
TIANJIN UNIV
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Problems solved by technology

At present, the 3D grouting numerical research considering complex geological conditions to determine the grout diffusion front based on the cement grout thixotropy model and VOF calculation has not been reported yet.

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  • Diffusion frontal surface curtain grouting numerical simulation method based on cement slurry thixotropy and VOF calculation
  • Diffusion frontal surface curtain grouting numerical simulation method based on cement slurry thixotropy and VOF calculation
  • Diffusion frontal surface curtain grouting numerical simulation method based on cement slurry thixotropy and VOF calculation

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] The invention proposes a curtain grouting three-dimensional numerical simulation method for calculating the grout front by considering grout thixotropy and VOF based on complex geological conditions. First, couple the 3D geological model and the grouting hole model to build a 3D unified model; then import the 3D unified model into the CFD software through the data interface, and use the polyhedral grid division technology to divide the 3D unified model into fine grids; The thixotropic fluid model reflecting its rheological properties, using the VOF method to calculate and capture the grout diffusion front, realizes the three-dimensional numerical simulation of the dam bedrock curtain grouting under complex geological conditions considering the grout thixotropy and the VOF calculation of the grout diffusion front. The technical flow of the curtain grouting numeri...

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Abstract

The invention discloses a diffusion frontal surface curtain grouting numerical simulation method based on cement slurry thixotropy and VOF calculation. The method comprises the following steps: establishing a three-dimensional geological model and a grouting hole model, and coupling the three-dimensional geological model with the grouting hole model to form a three-dimensional unified model; introducing the three-dimensional unified model to CFD calculation software, and dividing computational grids; building a cement slurry thixotropic fluid model, capturing a slurry diffusion frontal surface by the VOF method; achieving dam bed rock curtain grouting three-dimensional numerical simulation of the slurry diffusion frontal surface based on the cement slurry thixotropy and the VOF calculation under complex geological conditions. According to the method, the three-dimensional numerical simulation of the slurry diffusion frontal surface based on the cement slurry thixotropy and the VOF calculation is achieved under the complex geological conditions, the macroscopic effect is accurately known after the bedrock curtain grouting under the complicated geological conditions, and a precise numerical means is provided for forecast before the grouting or analysis after the grouting for dam curtain grouting.

Description

technical field [0001] The invention belongs to the field of numerical simulation of curtain grouting for dam bedrock in water conservancy and hydropower projects, and more specifically relates to a numerical simulation method for curtain grouting based on cement grout thixotropy and VOF for solving diffusion fronts. Background technique [0002] Curtain grouting is the main means of anti-seepage treatment of dam bedrock, and plays an important role in ensuring the safe operation of hydraulic structures. Because the anti-seepage curtain is completely located underground and has concealment, coupled with complex geological conditions, the movement process of the grout in the formation is also extremely complicated, which brings difficulties to accurately describe the movement of the grout, and affects the continuity and integrity of the curtain after construction. The effect of grouting is difficult to assess. Therefore, numerical simulation and analysis of the curtain grout...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10
Inventor 王晓玲邓韶辉吴斌平祝玉珊陈文龙
Owner TIANJIN UNIV
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