Retractable guniting wall protector and construction method thereof

A shotcrete and shrinkage technology, which is applied in shaft equipment, earthwork drilling, wellbore lining, etc., can solve problems such as shotcrete wall cracking, and achieve the effects of avoiding cracking, simple and reliable processing and manufacturing technology, and stable physical and mechanical properties

Inactive Publication Date: 2011-02-16
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a shrinkable shotcrete wall protection device to solve the cracking problem of the roadway shotcrete wall

Method used

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  • Retractable guniting wall protector and construction method thereof
  • Retractable guniting wall protector and construction method thereof

Examples

Experimental program
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Embodiment Construction

[0013] Such as figure 1 As shown, the shrinkable sprayed grouting wall protection device of the present invention is made up of two parts, a shrinkable device and a connecting device, wherein:

[0014] Described collapsible device is made of elastic tubular fan-shaped frame 1 and elastic ring pipe fitting 2; The thickness of the slurry wall is appropriate; the circular pipe fitting 2 is welded in the fan-shaped frame 1 .

[0015] The connecting device is that one end of the connecting rod 3 is provided with a collar 4, and the other end of the connecting rod 3 is connected to the bottom frame opening of the fan-shaped frame 1.

[0016] The four frames of the fan-shaped frame in the above embodiment are processed from low-alloy high-strength Q345B steel plates with good toughness and strong deformability; the above-mentioned circular pipe fittings are low-alloy high-strength Q345B steel circular pipes with good deformability.

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Abstract

The invention discloses a retractable guniting wall protector and a construction method thereof. The retractable guniting wall protector is composed of a retractable device and a connecting device, wherein the retractable device is composed of an elastic tubular fan-shaped frame and an elastic annular tube; the fan-shaped frame is composed of a cambered baffle as the top surface and planar baffles as the rest of three surfaces; the height of the fan-shaped frame is suitable for the thickness of the guniting wall; the annular tube is welded in the fan-shaped frame; and in the connecting device, one end of a connecting rod is provided with a lantern ring, and the other end of the connecting rod is connected to the bottom frame opening of the fan-shaped frame. The construction method comprises the following steps: before guniting, installing the retractable guniting wall protector in the position which easily cracks, fixing with an anchor rod through the lantern ring, and guniting to embed the retractable device in the concrete. The retractable guniting wall protector has certain continuous bearing strength and strong deformability, and can sufficiently release tunnel wall deformation, thereby preventing the tunnel wall from rupture due to failure of deformation.

Description

technical field [0001] The invention relates to supporting devices for mine roadways, traffic tunnels and water conservancy culverts. Background technique [0002] In recent years, shotcrete support is often used in underground roadways, and the wall surface of shotcrete support often cracks due to high stress or mining. After cracking, the cracks gradually expand, resulting in roadway roof fall, support structure damage and other diseases. At present, there is no good means to control and prevent the cracking of the shotcrete wall of the roadway at home and abroad. Contents of the invention [0003] The invention provides a shrinkable shotcrete wall protection device to solve the cracking problem of the roadway shotcrete wall. [0004] The structure of the shrinkable spray grouting protection wall device of the present invention is: it is made up of shrinkable device and connecting device two parts; Wherein: [0005] Described collapsible device is made of an elastic tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 李廷春邢雪阳
Owner SHANDONG UNIV OF SCI & TECH
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