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Construction method of fabricated under-crossing tunnel

A construction method and prefabricated technology, which can be applied to artificial islands, water conservancy projects, underwater structures, etc., can solve the problems of long construction period of underpass tunnels, achieve the effects of speeding up the assembly progress, stabilizing the support, and improving construction efficiency

Inactive Publication Date: 2019-01-15
CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of the long construction period of the underpass tunnel, the design of the prefabricated underpass tunnel is proposed. The main body of the tunnel is mainly a single-layer frame-type cast-in-place structure, and also includes a certain length of building industrialized prefabricated assembly section

Method used

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  • Construction method of fabricated under-crossing tunnel
  • Construction method of fabricated under-crossing tunnel
  • Construction method of fabricated under-crossing tunnel

Examples

Experimental program
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Embodiment

[0043] This embodiment provides a construction method for an assembled underpass tunnel;

[0044] The construction method of the assembled underpass tunnel in this embodiment includes the following steps:

[0045] a. Construct a concrete foundation at the bottom of the foundation pit, and install steel rails extending longitudinally along the tunnel at the position corresponding to the vertical wall of the tunnel;

[0046] b. After the bottom plate 1 is hoisted to the rail and placed in place, the top plate 2 is lifted to align above the bottom plate and dropped into place, and the bottom plate and the top plate are connected and assembled into a ring to form a single tunnel segment;

[0047] c. After assembling the subsequent segments into a ring, push them until they fit together with the end face of the previous segment. When the number of segments reaches a certain amount, perform longitudinal permanent prestressing on multiple segments to form a hole segment 28;

[0048]...

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Abstract

The invention discloses a construction method of a fabricated under-crossing tunnel, comprising the following steps of: a, constructing a concrete foundation at the bottom of the foundation pit, and setting a steel rail thereon; b, lifting a bottom plate over the steel rail in place, lifting and aligning a top plate over the bottom plate and dropping the bottom plate down, and connecting and assembling the bottom plate and the top plate into a ring to form a single tunnel segment; c, assembling subsequent segments into a ring and then pushing the subsequent segment to attach the previous segment, and performing longitudinal permanent prestress compression on the plurality of segments to form a hole segment; d, repeating steps b and c to form a plurality of hole segments, and setting a settlement joint between the adjacent hole segments; e, grouting the gap between the segment bottom plate and the concrete foundation after the assembly is completed. According to the construction method,the under-crossing tunnel can be ensured to be assembled in order, the engineering quality of the entire under-crossing tunnel is ensured, the assembly progress of the under-crossing tunnel is also accelerated, the construction efficiency is improved, and the engineering cost is largely saved.

Description

technical field [0001] The invention relates to the field of underpass tunnel construction, in particular to a construction method for an assembled underpass tunnel. Background technique [0002] With the acceleration of the urbanization process and the maturity of the urban road network, the rapid transformation of the old urban roads has become increasingly important. In the rapid transformation of roads, the setting of underpass tunnels is one of the more scientific road structures. It has the advantages of saving ground space and the overall effect is simple and beautiful, so it has been widely used. Since the underpass tunnel reconstruction of the existing road is carried out in the existing urban road network, the construction period is very strict to reduce the disturbance to urban life. [0003] In order to solve the problem of the long construction period of the underpass tunnel, the design of the prefabricated underpass tunnel is proposed. The main body of the tun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E02D29/16
CPCE02D29/045E02D29/16
Inventor 田宝华王义春刘延龙黄静谭斌奚成张长春胡志勇林晓波刘雪松王智周全文李鹏徐闯
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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