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Spray anchor net hanging construction method capable of being used for roadway surrounding rock support

A technology of surrounding rock support and construction method, which is applied in the direction of tunnel, tunnel lining, installation of anchor rods, etc., can solve the problems of spraying anchor net hanging net construction and other problems, achieve low labor intensity, high hanging net quality, and high net hanging efficiency Effect

Inactive Publication Date: 2020-01-14
张军贤 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of spraying anchor net hanging net construction for roadway surrounding rock support in the roadway support construction process, the present invention provides a spraying bolt net hanging net construction method that can be used for roadway surrounding rock support

Method used

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  • Spray anchor net hanging construction method capable of being used for roadway surrounding rock support
  • Spray anchor net hanging construction method capable of being used for roadway surrounding rock support
  • Spray anchor net hanging construction method capable of being used for roadway surrounding rock support

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Embodiment Construction

[0024] The present invention is a spray-anchor-net-hanging-net construction method that can be used for roadway surrounding rock support, including the following steps:

[0025] A. Before the construction of the steel-plastic grid hanging net 5, determine the level of the surrounding rock surface, and clean the loose gravel on the surface of the surrounding rock;

[0026] B. Determine the width of the steel-plastic grid 5 according to the side length of the tunnel excavation section, and mark the centerline position 6 of the steel-plastic grid 5, such as figure 2 Shown

[0027] C. According to formula (a), calculate the required number of segments of steel-plastic grating 5.

[0028] N = L / L 0 (A)

[0029] Where: N Is the number of sections of the steel-plastic grid 5; L is the depth of the roadway support; L 0 Is the length of the single-piece steel-plastic grille 5;

[0030] D. Use bolt boring machine to drill, the anchor hole layout spacing is 80cm×80cm, the position is accurate, th...

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Abstract

The invention relates to a roadway construction method, particularly relates to a spray anchor net hanging construction method capable of being used for roadway surrounding rock support, and solves the net hanging problem of steel plastic grilles in roadway engineering. The method comprises the following steps that the flatness of surrounding rock is determined, loose broken stones on the surfaceof the surrounding rock are cleared, the width of the steel plastic grilles is determined, drilling is carried out, the steel plastic grilles are laid sequentially and symmetrically according to the sequence of an arch crown, an arch waist, a side wall and a footing, an anchor rod is installed, the installation quality is checked, and hanging supplementing is carried out. Through the net hanging method, the roadway construction working face is saved, the roadway net hanging efficiency is improved, the labor intensity of construction personnel is reduced, the stability of the roadway surrounding rock is guaranteed, and the safety and high efficiency of roadway excavation are ensured.

Description

Technical field [0001] The invention relates to a spray-anchor net-hanging support method, in particular to a spray-anchor net-hanging net construction method for supporting the surrounding rock of a roadway. Background technique [0002] When solving the problem of surrounding rock stability in roadway construction, shotcrete bolt mesh support has become the most commonly used technology due to its significant technical advantages. In terms of improving the stress state of the surrounding rock of the roadway, enhancing the bearing capacity of the surrounding rock of the roadway, improving the integrity of the surrounding rock of the roadway, increasing the stability of the surrounding rock of the roadway, etc., the technical advancement and reliability of the effect of the shotcrete bolt mesh support have been improved. It has been confirmed by a large number of engineering practices and has been widely used. [0003] In the process of traditional shotcrete anchor net support, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/15E21D11/18E21D20/00E21D20/02E21D21/00
CPCE21D11/107E21D11/152E21D11/18E21D20/003E21D20/025E21D21/00
Inventor 张军贤
Owner 张军贤
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