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A method for advanced prediction and forecasting of expansive surrounding rock deformation in long-distance tunnels

A technology of surrounding rock deformation and advanced prediction, which is applied in the directions of measuring devices, surveying and navigation, instruments, etc., can solve problems such as difficult to achieve surrounding rock expansion, and achieve the effect of quantitative prediction, comprehensive disclosure, and guarantee of applicability

Active Publication Date: 2021-07-02
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

However, for large deformations with special properties such as expansive surrounding rocks, because the expansibility is closely related to the mineral composition and content contained in the rock mass, there is still a relatively complete set of advanced prediction methods and forecast methods for expansive surrounding rocks. Implement technology as a guideline
After the actual construction of the tunnel project encounters expansive surrounding rock, only a qualitative description can be obtained. The design of reinforcement and support measures based on other engineering experience is difficult to quantify the large deformation of the surrounding rock according to the strength of the expansibility of the surrounding rock. Evaluation and Control

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  • A method for advanced prediction and forecasting of expansive surrounding rock deformation in long-distance tunnels
  • A method for advanced prediction and forecasting of expansive surrounding rock deformation in long-distance tunnels
  • A method for advanced prediction and forecasting of expansive surrounding rock deformation in long-distance tunnels

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The present invention proposes a long-distance tunnel expansive surrounding rock deformation prediction method in advance, the specific implementation process can be found in figure 1 Shown, the present invention will be described in further detail below in conjunction with accompanying drawing.

[0035]Step 1: When using a long-distance tunnel for construction, the emergency passage used for ventilation and escape and rescue, which is often excavated in parallel with the main tunnel, is connected to the main tunnel with a diagonal passage. With the help of this kind of emergency passage, arrange the parallel small guide holes in advance. Use advanced parallel small pilot tunnels to conduct geological surveys on the side walls inside the tunnel and make geological sketches on the face of the tunnel. By drawing parallel pilot t...

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Abstract

The invention discloses a method for predicting and predicting the deformation of expansive surrounding rock in a long-distance tunnel in advance, in particular to the method for discriminating expansive rock mass and predicting and predicting the deformation of expansive surrounding rock based on advanced pilot tunnels and intelligent feedback technology. During the construction period, the stratum in front of the face of the tunnel is discriminated against the expansibility and degree of expansion of the rock mass, and then the composite expansion viscoelastic-plastic model is used to conduct intelligent feedback analysis according to the actual deformation of the surrounding rock to obtain the surrounding rock that meets the site conditions. Mechanical parameters, realize the quantitative prediction of expansive surrounding rock, quantitatively predict the deformation law and magnitude of surrounding rock, and provide a basis for the design optimization and construction plan demonstration of expansive surrounding rock support.

Description

technical field [0001] The invention relates to the technical field of advance prediction and prediction of expansive surrounding rock deformation in long-distance tunnels, and specifically refers to a method for advanced prediction and prediction of expansive surrounding rock deformation in long-distance tunnels. Prediction, and carry out quantitative forecasting of expansive surrounding rock deformation. Background technique [0002] For long-distance hydraulic tunnels, tunnels (roads) of highways, railways and other line projects have the characteristics of long lines and passing through various geological units, so they often face geological conditions with large buried depth, variable geological units, and complex lithology. condition. Especially when the tunnel passes through the soft rock tunnel section or fault fracture zone, it will often encounter large deformation disasters of the surrounding rock, causing engineering problems such as deformation encroachment of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/32G01C7/06
CPCG01B21/32G01C7/06
Inventor 黄书岭丁秀丽钟鹏举王旭一刘登学刘欣张练刘通灵
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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