Construction method of tunnel prefabricated structure

A prefabricated structure and construction method technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of large lifting equipment, shield tunnel construction, and occupation of tunnel transportation space, etc., to achieve firm connection and construction Fast, cost-effective results

Pending Publication Date: 2020-11-13
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional prefabricated structure construction technology often requires large lifting equipment, or occupies the transportation space in the tunnel, which has a great impact on the normal construction of the shield tunnel

Method used

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  • Construction method of tunnel prefabricated structure
  • Construction method of tunnel prefabricated structure

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and embodiment example, the present invention will be further described:

[0022] Described a kind of tunnel prefabricated structure construction method is:

[0023] 1) The embedded nut 17 in the shield tunnel segment 1;

[0024] 2) Assemble segment 1;

[0025] 3) Construction of cast-in-place base 2;

[0026] 4) Assembling prefabricated walls or prefabricated columns 3;

[0027] 5) Lifting and assembling the prefabricated pallet 4, because the width of the prefabricated pallet 4 is greater than the net distance of the base 2, wall or column 3 in the tunnel, the transportation of the pallet 4 needs to be transported longitudinally along the long side of the tunnel, and it is hoisted to the prefabricated pallet 4 by a lifting device. After the 90° rotation is completed on the top of the wall 3, the feet 5 are installed on the prefabricated wall 3, and the cantilevered thin plates 6 at both ends protrude from the prefabric...

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Abstract

The invention discloses a construction method of a tunnel prefabricated structure. The construction method comprises steps as follows: shield tunnel segments embedded with nuts are assembled; a cast-in-situ foundation support is arranged at lower parts of the constructed shield tunnel segments; prefabricated walls or prefabricated columns are constructed at two sides of the cast-in-situ foundationsupport, a prefabricated support plate is mounted on the prefabricated walls or the prefabricated columns, and formwork trolleys and cast-in-situ joint bed forms are mounted on the foundation support; cast-in-situ layer rebars are tied on triangular shear reinforcements of the prefabricated support plate, and parts, close to inner arc surfaces of the segments, of two ends of the rebars bend downwards; and planted bars on the segments are bound with the cast-in-situ layer rebars and extending bars of the prefabricated support plate; a cast-in-situ layer above the prefabricated support plate and joints of two ends are poured, and anti-collision side stone mounting grooves are reserved; and after strength of the cast-in-situ layer reaches 80%, anti-collision side stones are mounted in the anti-collision side stone mounting grooves. The construction method of the tunnel prefabricated structure adapts to narrow construction space in a shield tunnel, does not affect vehicle traffic in the tunnel, has convenience in structural mounting, and is firm in connection, fast to construct, economical and reasonable.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and in particular relates to a construction method for a tunnel prefabricated structure. Background technique [0002] In recent years, with the rapid development of social economy and urbanization, shield tunneling technology has become an indispensable key technology in the construction of major transportation infrastructure in my country, and the prefabrication of tunnel internal structures has also become a part of shield tunnel construction. Trend. [0003] In order to meet the driving needs of 2-3 lanes in urban roads or highway tunnels, the width of the prefabricated lane slabs is relatively large, but the interior space of the tunnel is limited and the large lifting equipment is limited, so it is inconvenient to transport and hoist the prefabricated lane slabs in the tunnel; There are many tunnel construction operations, and the prefabrication and assembly of the internal structure must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/08E21D11/40E21D11/10
CPCE21D11/003E21D11/08E21D11/102E21D11/107E21D11/40
Inventor 温竹茵周质炎张亚洲由广明高卫平刘念
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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