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Anti-disengaging tunnel secondary lining concrete pouring constructing method and formwork system

A secondary lining and concrete technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve problems such as hidden danger of tunnel waterproofing

Inactive Publication Date: 2015-09-09
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual engineering, the empty space is often at the centimeter or even decimeter level, which brings great hidden dangers to the waterproofing of the tunnel.

Method used

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  • Anti-disengaging tunnel secondary lining concrete pouring constructing method and formwork system
  • Anti-disengaging tunnel secondary lining concrete pouring constructing method and formwork system
  • Anti-disengaging tunnel secondary lining concrete pouring constructing method and formwork system

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Embodiment Construction

[0013] Such as Figures 1 to 3 As shown, the concrete pouring construction formwork system for the secondary lining of the anti-evacuation tunnel of the present invention includes a formwork and a hydraulic jack 7 . The template has a radian that matches the tunnel design, and circular steel cylinders 16 with inverted protrusions are arranged at intervals along the longitudinal direction of the template to form a T-shaped template 6 . The jack piston 9 of the hydraulic jack is connected to the propulsion piston through the force transmission column. The propulsion piston is removably placed inside the inverted protruding circular steel cylinder. The end of the propulsion piston has a radian matching the formwork to ensure the concrete surface Smooth transition.

[0014] Concrete pouring construction method for the secondary lining of the anti-evacuation tunnel using the aforementioned formwork system

[0015] Use high-strength steel to make the aforementioned T-shaped formwo...

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Abstract

The invention discloses an anti-disengaging tunnel secondary lining concrete pouring constructing formwork system. The system mainly comprises a formwork body and a hydraulic jack, and an inversely-protruding round steel cylinder is arranged on the formwork body to form a T-shaped formwork. Accordingly, a corresponding anti-disengaging tunnel secondary lining concrete pouring constructing method is built. The method includes the steps that the T-shaped formwork with the concrete storage function is used, after concrete pouring vibration and before concrete prehardening, a piston in the T-shaped formwork is pushed through the hydraulic jack so as to press in concrete in the inversely-protruding round steel cylinder, and therefore the problem of disengaging normally occurring in tunnel concrete secondary lining is solved. Compared with a commonly-used method for processing disengaging through embedded pipe slip casting, the constructing method and the formwork system have the advantages of being simple and convenient to use; the problem of disengaging generated in secondary lining concrete pouring in a tunnel is solved, and the integrity of concrete secondary lining can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of underground tunnel support construction, and in particular relates to a concrete pouring construction method and a formwork system for the secondary lining of an anti-evacuation tunnel. Background technique [0002] After the excavation of the underground tunnel, the close contact between the surrounding rock, the primary support and the secondary lining of the supporting structure system is an important guarantee factor to ensure the overall stability of the underground structure and prevent the tunnel from causing permeable water damage. There are many reasons for the voiding of the secondary lining of the tunnel, such as: insufficient pumping concrete pressure, deformation of the formwork support system, and shrinkage of the concrete, which often lead to the lack of compactness behind the lining, resulting in voiding, which will seriously threaten the safety of the tunnel during operation. Water resist...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 卢超波覃润浦张红波罗月静冯明珠姜洪亮张芮铭杨庭伟钟乃龙潘隆武陀楚明郑华斌闭晓东
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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