Method for deformation classification of tunnel squeezed carbonaceous phyllite

A phyllite and tunnel technology, applied in the field of tunnel surrounding rock deformation classification, can solve the problems of insufficient understanding of carbonaceous phyllite and inability to adopt it, and achieve the effects of wide adaptability, high reliability and high test accuracy.

Inactive Publication Date: 2018-11-06
HUAIYIN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

It can be seen that there are currently no relevant standards for deformation classification of carbonaceous phyllite in China, and most of them are only considering how to solve the problems of tunnel support structure and stability, and do not pay attention to understanding the characteristics and characteristics of phyllite itself. In-depth study of its deformation under the influence of different factors has led to insufficient understanding of carbonaceous phyllite, and it is impossible to take relevant targeted measures

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  • Method for deformation classification of tunnel squeezed carbonaceous phyllite
  • Method for deformation classification of tunnel squeezed carbonaceous phyllite
  • Method for deformation classification of tunnel squeezed carbonaceous phyllite

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[0029] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0030] A method for grading deformation of tunnel extruded carbonaceous phyllite, comprising the following steps:

[0031] (1) if figure 1 As shown, the definition of tunnel extrusive carbonaceous phyllite surrounding rock is as follows: the uniaxial saturated compressive strength of the rock is less than or equal to 5MPa, the in-situ stress value is greater than the strength of the surrounding rock, the strength-stress ratio of the surrounding rock is less than 0.25, and the ultimate strain of the surrounding rock Greater than 1.5%. And according to the results of field experiments, the deformation degree classification index of the tunnel extrusive carbonaceous phyllite surrounding rock is divided into: large deformation of grade I, large...

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Abstract

The invention discloses a method for deformation classification of a soft rock tunnel under the action of high ground stress in squeezed surrounding rock, and provides squeezed carbonaceous phyllite large-deformation classification standards, squeezed carbonaceous phyllite surrounding rock supporting and protecting characteristics and squeezed carbonaceous phyllite prediction and judgment basis. According to the present invention, the method has advantages of strong pertinence, simple and reliable classification method and the like, is suitable for the prediction and analysis of the deformation of soft rock tunnels under the action of high ground stress in squeezed surrounding rock, and can provide guarantee for the safe construction of projects.

Description

technical field [0001] The invention belongs to the field of deformation classification methods for tunnel surrounding rocks, and relates to a method for deformation classification of extruded carbonaceous phyllite in tunnels. Background technique [0002] A large number of carbonaceous phyllite tunnel collapse accidents show that the construction tunnel carbonaceous phyllite is soft, difficult to support, easy to be destroyed, and lack of long-term stability, which has always plagued the development of tunnel engineering. At present, the main problem facing carbonaceous phyllite tunnels at home and abroad is that they do not understand its characteristics and cannot judge its deformation classification, which leads to the tunnel support structure being easily damaged, and the long-term stability of the support structure cannot be guaranteed, so that in Tunnel construction often requires measures such as secondary support to ensure the safety of the tunnel, and people often ...

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Application Information

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IPC IPC(8): G01N33/24G01B21/32
CPCG01B21/32G01N33/24
Inventor 高焱夏晶晶耿纪莹吴蔚黄东辉胡志国
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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