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A method and an anchoring device for increasing the pull-out force of the concrete around the pre-embedded channel

A technology of warping pulling force and pre-embedded channel, applied in earthwork drilling, mining installations, tunnels, etc., can solve problems such as affecting the safety of subway operation, warping skin, affecting the appearance of segments, and reducing the warping of concrete. , Improve the pulling force, the effect of convenient construction

Active Publication Date: 2020-12-01
WUHAN RES INST OF MATERIALS PROTECTION
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AI Technical Summary

Problems solved by technology

When the distance between the anchor rods is too large, the surrounding concrete warping of the pre-embedded channel will occur when the pullout force is applied. The warping not only affects the appearance of the segment, but also causes warping of the concrete in the later operation of the subway. It will affect the safety of subway operation and leave a potential safety hazard

Method used

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  • A method and an anchoring device for increasing the pull-out force of the concrete around the pre-embedded channel
  • A method and an anchoring device for increasing the pull-out force of the concrete around the pre-embedded channel
  • A method and an anchoring device for increasing the pull-out force of the concrete around the pre-embedded channel

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Embodiment 1

[0033] The installation diagram of this method is shown in figure 1 , the anchoring device includes an arc-shaped channel 1, a T-bolt 2 and a straight rigid backing plate 3, the arc-shaped channel 1 includes a notch 1.1 and an anchor rod 1.2, and the notch 1.1 is used to install the T-bolt 2 The T-shaped head and anchor rod 1.2 are used to pre-embed and anchor the arc-shaped channel 1 in the segment of the tunnel, and the straight strip-shaped rigid backing plate 3 is provided with bolt holes 5 .

[0034] A method for improving the pull-out force of concrete around a pre-embedded channel, the pre-embedded channel being a pre-embedded curved channel 1, comprising the following steps:

[0035] First place the T-shaped head of the T-shaped bolt 2 in the groove of the arc-shaped groove 1;

[0036] Then the screw rod of the T-bolt 2 is set with a straight strip type rigid backing plate 3 with a bolt hole 5, and the length direction of the straight strip type rigid backing plate 3...

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Abstract

The invention discloses a method for improving pre-buried-channel peripheral-concrete peeling drawing force and an anchor device. A pre-buried channel is a pre-buried arc channel; the method includesthe steps that a T-shaped head of a T-shaped bolt is arranged in a channel body of the arc channel; a threaded rod of the T-shaped bolt is sleeved with a straight-strip rigid padding plate provided with a bolt hole, and the length direction of the straight-strip rigid padding plate is same as the channel direction of the arc channel; the straight-strip rigid padding plate is fastened on the threaded rod through a nut, the straight-strip rigid padding plate is deformed to compactly fit with the arc surface of the arc channel, and the extending part of the threaded rod serves as an installing point of ancillary facilities in a tunnel. According to the method, the pre-buried-channel peripheral-concrete peeling drawing force is greatly improved; the technology cost is low, the cost performanceis high, the low drawing force peeling problem of a large-anchor-rod-interval pre-buried channel can be effectively solved, and a drawing value of a normal-anchor-rod-interval pre-buried channel canalso be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of pre-embedded channels, and relates to a method for preventing concrete warping around a pre-embedded channel, in particular to a method and an anchoring device for increasing the pulling force of concrete around a pre-embedded channel. Background technique [0002] China's urban rail transit is moving towards intelligence, dataization, automation, energy saving and high efficiency. The intelligent, data-based and automated operation of rail transit is inseparable from catenary and supporting strong and weak current cable brackets, FAS pipelines, lighting pipelines, interval telephone lines, fire water pipes, emergency evacuation platforms and other pipelines. The current conventional practice is to install and fix pipelines on the completed shield tunnel segments by means of chemical reinforcement or expansion bolts. These methods require drilling holes in the existing structure, which will cause certain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/02E21D11/08E21D20/00
CPCE21D11/08E21D20/00E21F17/02
Inventor 万桥陈亚平李长春张松韦雨齐姜新华
Owner WUHAN RES INST OF MATERIALS PROTECTION
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