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A buffer layer design method for rapid tunnel construction

A design method and buffer layer technology, applied in tunnels, tunnel linings, mining equipment, etc., to achieve the effect of ensuring early safety

Active Publication Date: 2021-12-07
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Specifically, the technical problem to be solved by the present invention is: to provide a buffer layer design method for rapid tunnel construction to solve the existing technical problems

Method used

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  • A buffer layer design method for rapid tunnel construction
  • A buffer layer design method for rapid tunnel construction
  • A buffer layer design method for rapid tunnel construction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment one: if figure 1 Shown, a kind of buffer layer design method of tunnel rapid construction, described method comprises the following steps:

[0057] (1) Establish the control objectives for rapid tunnel construction;

[0058] (2) Determine the required calculation parameters according to the control objectives;

[0059] (3) Select the tunnel buffer layer compression and load transfer mode;

[0060] (4) Calculate and determine the performance index and design parameters of the buffer layer according to the compression and load transfer mode of the tunnel buffer layer, where the performance index is the elastic modulus, and the design parameters are thickness and maximum compression deformation.

[0061] To apply the buffer layer to the rapid construction, firstly, it should be clear that the control target of the rapid construction of the tunnel should be achieved after the buffer layer is applied. The target mainly includes the following two aspects:

[0062]...

Embodiment 2

[0117] Embodiment 2: Taking the rapid construction of a soft rock tunnel as an example, the completion time of the initial support of the tunnel is January 20, and the thickness of the initial support of the tunnel is 30cm; the deformation function of the initial support structure of the tunnel is: The construction time of the secondary lining of the tunnel is January 24. According to the indoor strength test of the secondary lining concrete, it is known that the time history function of the bearing performance of the secondary lining structure of the tunnel is: The design value is CS max =40MPa, when the design value is reached, the duration is T 2 = 28 days, the above are the basic parameters of tunnel construction.

[0118] (1) Calculating the deformation time of the initial support of the tunnel

[0119] According to the deformation function of the initial support structure of the tunnel, the deformation time history curve of the initial support of the tunnel is drawn,...

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Abstract

The present invention relates to the technical field of tunnel construction, in particular to a buffer layer design method for rapid tunnel construction, comprising the following steps: (1) establishing a control target for rapid tunnel construction; (2) determining required calculation parameters according to the control target; (3) Select the compression and load transfer mode of the tunnel buffer layer; (4) Calculate and determine the performance index and design parameters of the buffer layer according to the compression and load transfer mode of the tunnel buffer layer, where the performance index is the elastic modulus, and the design parameters are thickness and Maximum compression deformation, compared with the prior art, the beneficial effect of the present invention is: the method aims to propose a buffer layer design method to avoid the early cracking of the secondary lining in the rapid construction process of the tunnel as the control target, endowing the buffer layer with Functions in Rapid Construction, calculation methods for buffer layer design are given.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a buffer layer design method for rapid tunnel construction. Background technique [0002] In the construction of mountain tunnel engineering, the design and construction of tunnel engineering generally adopt the new Austrian method construction concept, that is, to make full use of the self-bearing capacity of the surrounding rock, when the primary support deformation is basically stable, the secondary lining structure of the tunnel is constructed, and in some Under special circumstances, such as high ground stress, soft rock (including expansive rock), loess tunnels and strict tunnel construction schedules, it is required that the secondary lining of the tunnel be constructed as soon as possible after the completion of the primary support, in order to enhance the tunnel support strength or to achieve rapid construction However, due to the large thickness of the secon...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/05G06F30/13G06F119/14
CPCE21D11/00E21D11/05G06F30/13G06F2119/14
Inventor 许崇帮李磊
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT