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Tunnel surrounding rock safety grading method

A technique for grading and grading methods of surrounding rocks, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as inapplicability

Inactive Publication Date: 2015-05-27
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the above-mentioned existing methods for evaluating the stability of tunnel surrounding rocks are not suitable for tunnel surrounding rocks that do not have stability, such as complex tunnel surrounding rocks.

Method used

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Embodiment 1

[0076] In the embodiment of the present invention, the safety of the tunnel is regarded as the purpose of the surrounding rock classification, which usually refers to: ① the tunnel can maintain a certain self-stability after excavation, and can carry out effective support within this period; The initial support will not cause structural failure before the secondary lining is applied; ③ The system formed by the surrounding rock of the tunnel and the support will not be damaged or unstable as a whole. In engineering practice, as the surrounding rock conditions are not stable, the complexity of safety control and disposal methods are also very different. Obviously, it is very necessary to evaluate and classify its safety.

[0077] It can be seen that the surrounding rock classification based on safety focuses on the special surrounding rock conditions that do not have stability, and its classification index should focus on the advanced deformation and damage of the surrounding roc...

Embodiment 2

[0151] Engineering example application

[0152] The deformation control-based tunnel advance support design method proposed in the embodiment patent of the present invention has been successfully applied in projects such as the Guizhou-Guangzhou Railway Tunnel and the Hefei Railway. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0153] 1) Project overview

[0154] A tunnel is located in Hezhou City, Guangxi Province, and the tunnel generally presents a northwest-southeast direction. The starting and ending mileage of the tunnel is DK592+058~DK594+496, and it is a tunnel with relatively difficult construction in the Guizhou-Guangzhou high-speed railway. Among them, the entrance section of the tunnel DK592+058~090 is connected to the Changming Cave, DK592+090~+300 is the entrance shallow buried section, the buried depth is 2~20m, the excavation span is 14.7m, the tunnel elevation is 12.5m, and the...

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Abstract

The embodiment of the invention provides a tunnel surrounding rock safety grading method. The method mainly includes the following steps: according to a factor set and an evaluation set of tunnel surrounding rock grading, a factor grade evaluation matrix R is established; according to the influence level of each factor in the factor set of tunnel surrounding rock grading, a factor weight set A is established; compositional operation for fuzzy matrixes is carried out on the factor grade evaluation matrix R and the factor weight set A, so that primary fuzzy matrixes are obtained, the primary fuzzy matrixes are arranged sequentially, so that a secondary fuzzy matrix is obtained, and according to the secondary fuzzy matrix, an evaluation result of tunnel surrounding rock grading is calculated by the maximum membership degree method or the weighted average method. The embodiment of the invention mainly aims at special surrounding rock conditions without stability, for grading indexes, advanced deformation and failure conditions of surrounding rock under the influence of tunnel construction are mainly taken into consideration, surrounding rock deformation, failure area scope and distribution pattern can be adopted to represent safety, the essential characteristics of complex tunnel surrounding rock is caught by the grading indexes, and thereby the safety of tunnel surrounding rock can be graded accurately and effectively.

Description

technical field [0001] The invention relates to the technical field of tunnel surrounding rock evaluation, in particular to a safety grading method for tunnel surrounding rock. Background technique [0002] In recent years, with the large-scale construction of transportation infrastructure, my country has built a large number of railway, highway and urban subway tunnel projects. Due to the needs of resource and energy development, the construction scale of mine tunnels (lanes) has also reached an unprecedented level. Level. With the advancement of my country's transportation facilities to remote mountainous areas and the increase in the depth of mining, the prominent problem brought about is that the surrounding rock conditions have deteriorated, and the stability control of surrounding rocks has gradually become a core issue, and tunnel engineering has an absolute impact on geological conditions. dependency. Therefore, the surrounding rock conditions largely determine the s...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张顶立台启民房倩宋浩然陈立平于富才孟猛
Owner BEIJING JIAOTONG UNIV
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