Method for solving surrounding rock stress and displacement of shallow-buried tunnel in cavern-containing stratum under action of gravity

A technology for surrounding rock and surrounding rock stress in shallow tunnels, applied in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2019-10-25
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] ②The ground deformation generated during the construction process is easily transmitted to the surrounding buildings (structures), thereby endangering the safety of the surrounding buildings (structures)
[0007] ① When using the empirical prediction method, the main parameters need to be determined manually, which is greatly influenced by the experience of engineers. The empirical method can only predict the formation deformation, and the empirical method cannot reveal the mechanical mechanism of the formation deformation
[000

Method used

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  • Method for solving surrounding rock stress and displacement of shallow-buried tunnel in cavern-containing stratum under action of gravity
  • Method for solving surrounding rock stress and displacement of shallow-buried tunnel in cavern-containing stratum under action of gravity
  • Method for solving surrounding rock stress and displacement of shallow-buried tunnel in cavern-containing stratum under action of gravity

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Embodiment 1

[0114] The embodiment of the present invention provides an analytical solution method for the stress and displacement of the surrounding rock of a shallow tunnel that can consider both the gravity load release process and the interaction between the tunnel and the cavity, so as to realize rapid engineering evaluation.

[0115] The embodiment of the present invention provides a method for solving the stress and displacement of the surrounding rock of a shallow tunnel in a stratum with a cavity under the action of gravity. The method is based on the principle of the complex variable function method and the alternating method, and considers the interaction between the gravity load and the tunnel and the cavity. Through comparative analysis with the finite element numerical simulation results, the correctness and efficiency of the analytical solution are verified. The specific solution process of this method is as figure 1 As shown, including the following processing steps:

[0116] S...

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Abstract

The invention provides a method for solving surrounding rock stress and displacement of a shallow-buried tunnel of a cavern-containing stratum under the action of gravity. The method comprises the following steps: calculating a complex potential analytic function of surrounding rock stress and displacement of the shallow-buried tunnel under the action of gravity field stress release load; calculating additional surface force caused by the tunnel on the boundary of the cavity; calculating a surrounding rock stress and displacement complex potential analytic function of the cavity under the action of the additional surface force; calculating an additional surface force caused by the cavity on the tunnel boundary; calculating a surrounding rock stress and displacement complex potential analytic function of the tunnel under the action of the accessory surface force; repeatedly executing the processing process until a set stop condition is met; and superposing the complex potential analyticfunction obtained by previous iteration to obtain a final complex potential analytic function of the surrounding rock stress and displacement of the shallow-buried tunnel and a final calculation formula of the surrounding rock stress and displacement. According to the method, the mutual influence between the tunnel and the cavity can be considered; gravity field stress release in the tunnel excavation process can be considered, the solving efficiency is high, and the solving precision is good.

Description

Technical field [0001] The invention relates to the technical field of urban underground tunnels, in particular to a method for solving the stress and displacement of the surrounding rock of a shallow tunnel with a cavity under the action of gravity. Background technique [0002] my country is in the process of rapid urbanization. The population in the core area of ​​the city is growing rapidly. The traffic pressure facing the city is becoming increasingly prominent, and it has even become a major bottleneck factor in urban development. As an efficient, punctual, and large-volume transportation method, the subway is widely used in major cities in China, and the number of subway tunnels will greatly increase in the future. Urban subway tunnels have the following characteristics: [0003] ① Generally, the buried depth is shallow, and gravity is the main external load. [0004] ②The stratum deformation generated during the construction process is easily transmitted to the surrounding ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 张成平杨公标张顶立叶子剑苏洁
Owner BEIJING JIAOTONG UNIV
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