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Geomechanics model production method based on compacting work recombination action function reverse control principle

A technology of compound action and control principle, applied in the field of geomechanical models, can solve problems such as parameter distortion, and achieve the effect of ensuring uniformity and improving the quality of model production.

Inactive Publication Date: 2008-07-16
TSINGHUA UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a geomechanical model making method based on the principle of reverse control of the compaction work composite action function, which overcomes the deficiency of the existing model making method that the overpressure affects the distortion of the mechanical parameters of the model material, and improves the quality of model making , the present invention proposes a reverse control principle based on the compound action function of compaction work to ensure the uniformity and consistency of material bulk density, and the manufacturing technology designed to realize this principle, which can be applied to the model making of various geotechnical engineering similar model tests

Method used

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  • Geomechanics model production method based on compacting work recombination action function reverse control principle
  • Geomechanics model production method based on compacting work recombination action function reverse control principle

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Experimental program
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Embodiment Construction

[0025] (Take two model tests as an example)

[0026] 1. Model test 1

[0027] Experiment 1 is a simulation of the construction process of the crossing section of the shield subway tunnel. The size of the model is 6.2m×1.8m×2.7m (L×W×H), as shown in Figure 1.

[0028] 2. Model test 2

[0029] Experiment 2 is a simulation study on the construction process of the shield tunnel extension subway station. The final size of the model is determined to be 6.5m×1.8m×2.88m (L×W×H), see Figure 2 for details.

[0030] in situ test

[0031] Model test 1 was filled with the traditional constant volume control method, and after the filling was completed, an in-situ sampling test of bulk density was carried out. The sampling data is plotted and fitted as shown in Figure 3. From the fitting data, it can be seen that the bulk density of the model gradually increases from top to bottom. The formula (1) is obtained by fitting the quadratic polynomial, where ρ is the dry density inside the mo...

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Abstract

The invention relates to a manufacturing method of a geomechanics model based on a reverse control principle of a compacting power composite action function, which belongs to the geomechanics model technical field. The manufacturing steps are that: a compacting power composite action function of a specific model and parameter thereof are determined, and the model is manufactured by adopting a model filling reverse controlling method. According to the compacting power composite action function, virtual controlling dry density and filling volume of each layer of the model are calculated to perform the reverse control, a compaction proposal determined by a test is adopted, finally, the model with uniform properties and actual volume weight of each layer meeting design requirements is manufactured. The invention has the advantages that: The manufacturing method of the geomechanics model based on the reverse control principle is provided through putting forward control concepts of 'compacting power composite action function' and 'virtual volume weight', thereby overcoming the defect that the compaction method of the prior geomechanics model leads material mechanics parameters to be distorted because of the effect of overpressure, and improving the manufacture quality of the model.

Description

technical field [0001] The invention belongs to the technical field of geomechanics models, and in particular provides a method for making a geomechanics model based on the principle of reverse control of the composite function of compaction work, the principle of reverse control for ensuring the uniformity and consistency of material bulk density in test model making, and the realization of the method The manufacturing technology designed based on the principle can be applied to similar model tests of various geotechnical engineering. technical background [0002] Geomechanics model test is a method to study the influence of specific engineering geological conditions on engineering by means of experiments based on the theory of mechanics and according to certain similar principles. The difference between it and the ordinary structural model test is that this kind of test not only needs to simulate the building, but also needs to simulate the gravity and geological structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B25/00G09B25/06
Inventor 李仲奎王克忠张明廖宜
Owner TSINGHUA UNIV
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