Shallow-buried tunnel surrounding rock pressure calculation method in secondary failure mode

A technology of surrounding rock and secondary damage of shallow tunnel is applied in the field of surrounding rock pressure calculation of shallow tunnel under secondary damage mode, and achieves the effect of high calculation efficiency and complete theoretical basis.

Pending Publication Date: 2021-04-09
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention can solve the problem of accurate calculation of the existing surrounding rock pressure, thereby providing a reasonable guidanc

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shallow-buried tunnel surrounding rock pressure calculation method in secondary failure mode
  • Shallow-buried tunnel surrounding rock pressure calculation method in secondary failure mode
  • Shallow-buried tunnel surrounding rock pressure calculation method in secondary failure mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] as attached figure 1 , attached figure 2 Shown: A method for calculating the surrounding rock pressure of shallow tunnels under the secondary failure mode based on the upper limit analysis theory, which includes the following steps:

[0034] Destruction model construction→calculation of work done by external force→calculation of work done by internal force→limit equilibrium analysis→optimization solution of surrounding rock pressure.

[0035] The present invention is implemented like this:

[0036] as attached figure 1 , attached figure 2 shown.

[0037] Initially, the failure mode after excavation of the structural tunnel:

[0038] At present, many scholars have conducted research on the failure modes of shallow buried tunnels. The most important and widely used ones are the Taishaji failure mode and the highway tunnel failure ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a shallow-buried tunnel surrounding rock pressure calculation method in a secondary failure mode. The calculation method comprises the following steps of failure model construction, external force acting, internal force acting, limit equilibrium analysis and optimal solution of surrounding rock pressure. According to the method, a secondary failure mode after tunnel excavation is constructed on the basis of the limit upper limit analysis theory in combination with the actual situation of field construction, and on the basis, a surrounding rock pressure calculation formula is derived from the perspective of energy on the basis of the energy superposition principle and according to the shallow-buried tunnel failure internal mechanism process. Meanwhile, according to the limit upper limit analysis theory, the limit analysis solution is the optimal solution (the maximum value or the minimum value), the optimization theory is introduced, and the limit analysis solution is solved. The calculation method has a relatively complete theoretical basis and high calculation efficiency, and can further correct the surrounding rock pressure in combination with the actual measurement result of the field surrounding rock pressure to obtain a more accurate calculation solution.

Description

technical field [0001] The invention relates to the technical field of tunnel design and construction, in particular to a method for calculating the surrounding rock pressure of a shallow-buried tunnel under a secondary failure mode based on the upper limit analysis theory. Background technique [0002] In infrastructure facilities such as underground passages and comprehensive pipe galleries, tunnels are the most commonly used structural form, and generally consist of advance support, primary support, waterproof structure, and secondary lining. Primary support, as the main bearing structure of tunnel surrounding rock pressure, plays an important bearing role in tunnel construction and operation. In order to meet the functional requirements of the load-bearing structure, the initial support structure should be based on the magnitude of the surrounding rock pressure it bears. Therefore, the correct calculation of the surrounding rock pressure is of great significance to ensu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F30/13G06F119/14
CPCG06F30/13G06F2119/14
Inventor 刘毅祁义辉程振威陈俊曹世江
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap