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Tunnel secondary-lining steel bar binding and positioning device

A secondary lining and steel bar binding technology, which is applied in the field of reinforced concrete, can solve the problems of long positioning process time, difficult points, and low precision, and achieve the effects of simple construction, reduced exposed bars, and improved work efficiency

Pending Publication Date: 2018-04-24
NO 4 ENG CO LTD OF CHINA RAILWAY 11 BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a secondary lining steel bar binding and positioning device for tunnels in view of the problems of long time, difficult points, low precision and low efficiency in the existing secondary lining steel bar binding positioning process

Method used

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  • Tunnel secondary-lining steel bar binding and positioning device
  • Tunnel secondary-lining steel bar binding and positioning device
  • Tunnel secondary-lining steel bar binding and positioning device

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] see Figure 1 to Figure 2 , a tunnel secondary lining steel bar binding positioning device, including longitudinal steel clamp 5 braces 6 . The length of the longitudinal reinforcement fixture 5 is determined according to the longitudinal distance between the adjacent positioning points of the secondary lining reinforcement. The spacing is the design spacing of the secondary lining reinforcement. The length of the strut 6 is about two lining thicknesses, and the strut 6 is made of a rectangular rod with a suitable section. A retractable push rod 7 is arranged inside the support rod 6. The length of the retractable push rod 7 is the maximum length from the section of the primary support 1 to the outer limit of the secondary lining design, and is used to control the waterproof layer 2 to the circumferential reinforcement 3 on b...

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Abstract

A tunnel secondary-lining steel bar binding and positioning device comprises longitudinal steel bar clamps (5) and supporting rods (6), wherein the lengths of the longitudinal steel bar clamps (5) aredetermined according to a longitudinal separation distance between adjacent positioning points of secondary-lining steel bars, the longitudinal steel bar clamps (5) are longitudinally provided with annular steel bar clamping grooves (13), the separation distance between the annular steel bar clamping grooves (13) is the design separation distance between the secondary-lining steel bars, the lengths of the supporting rods (6) are the thicknesses of secondary lining, extensible ejection rods (7) are arranged in the supporting rods (6), the lengths of the extensible ejection rods (7) are the maximal length from the cross section of a preliminary bracing (1) to the designed outer side boundary of secondary lining, the supporting rods (6) are provided with limiting clamp grooves (11), and thelongitudinal steel bar clamps (5) are arranged on the supporting rods (6) through the limiting clamp grooves (11). The secondary-lining steel bar positioning and binding precision is improved, the risks of secondary-lining bar exposure and inaccurate positioning are reduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a positioning device, more specifically to a positioning device for binding steel bars in secondary lining of tunnels, and belongs to the technical field of reinforced concrete. Background technique [0002] In the construction of weak surrounding rock tunnels, the secondary lining is an indispensable layer of the stressed structure, which is generally a reinforced concrete structure; and the quality of the reinforcement binding in the secondary lining directly affects the secondary lining structure. The effect of force structure. [0003] In the positioning construction of the secondary lining reinforcement of the tunnel, the binding and positioning of the secondary lining reinforcement of the existing tunnel usually adopts single-point positioning: the height of the reinforcement support of several nodes on each outer circumferential reinforcement is used to control the entire ring of the single outer reinforcement. For the ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/40
CPCE21D11/107E21D11/40
Inventor 王永太徐腾辉杨学林刘素云周冬梅黄正凯吕达李颖杰
Owner NO 4 ENG CO LTD OF CHINA RAILWAY 11 BUREAU GRP
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