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Circular prestressed support system for subway connection channel construction and assembling method

A communication channel and prestressing technology, applied in tunnels, shaft equipment, earthwork drilling and mining, etc., can solve the problems of stratum stress balance damage, unsatisfactory construction effect, and large space occupation

Active Publication Date: 2021-06-08
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found that the removal of segments at the bell mouth of the communication channel is a high-risk process. During the block-by-block removal process, the original stress balance of the formation is destroyed and the stress redistribution of the formation is caused, which may lead to the too much deformation
In order to ensure the construction safety of the "segment opening" process, a temporary rigid support is generally chosen to meet the construction needs, but the inventor believes that the traditional rigid support has a complex structure, takes up a large space, is inconvenient to install and disassemble, has a large amount of welding, and has a high rate of reuse. Low-level short-board problems, unsatisfactory construction effect

Method used

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  • Circular prestressed support system for subway connection channel construction and assembling method
  • Circular prestressed support system for subway connection channel construction and assembling method
  • Circular prestressed support system for subway connection channel construction and assembling method

Examples

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Effect test

Embodiment 1

[0031] In a typical implementation of the present invention, this embodiment discloses a circular prestressed support system for subway communication passage construction, which includes a plurality of prestressed supports, and adjacent supports are connected by connecting pieces. The prestressed support includes a first arc-shaped prefabricated part 4, a second arc-shaped prefabricated part 5, a rigid pier 6 and a jacking mechanism, the first arc-shaped prefabricated part 4 includes a plurality, and the second arc-shaped prefabricated part 5 includes one, A plurality of first arc-shaped prefabricated parts and a second arc-shaped prefabricated part are connected end to end to form an annular support 3, the first arc-shaped prefabricated part 4 and the second arc-shaped prefabricated part 5 form the main structure supporting the tunnel, and the two arc-shaped prefabricated parts The parts can fully share the stress from the subway tunnel and improve the stability of the support...

Embodiment 2

[0071] In a typical implementation of the present invention, this embodiment discloses an assembly method of a circular prestressed support system for the construction of a subway communication channel, which is used for assembling the circular prestressed support system for the construction of a subway communication channel as described in Example 1. A prestressed support system comprising the following steps:

[0072] Set up multiple rows of rigid buttresses;

[0073] A second curved prefabricated part is arranged on each row of rigid piers, and the first curved prefabricated part is connected on both sides of the second curved prefabricated part;

[0074] The connecting piece is connected between the rigid piers in the same row;

[0075] Simultaneously connecting a pair of first curved prefabricated parts at the same height until the annular support is formed;

[0076] At the same time, a pair of screw jacks at the same height are connected to the corresponding first arc-...

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Abstract

The invention discloses a circular prestressed support system for subway connection channel construction and an assembling method, and belongs to the technical field of underground engineering. The circular prestressed support system for subway connection channel construction is simple and stable in structure, excellent in performance and good in engineering applicability, can be widely applied to freezing construction of subway connection channels. The circular prestressed support system for subway connection channel construction comprises a plurality of prestressed supports, wherein the adjacent supports are connected through connecting pieces, the prestressed support comprises a plurality of first arc-shaped prefabricated pieces, one second arc-shaped prefabricated piece, rigid buttresses and a jacking mechanism, and the first arc-shaped prefabricated pieces and the second arc-shaped prefabricated piece are connected end to end to form an annular support; the second arc-shaped prefabricated piece and the first arc-shaped prefabricated pieces on the two sides are all connected with the rigid buttresses, and the first arc-shaped prefabricated pieces separated from the second arc-shaped prefabricated pioece are further connected with the jacking mechanism.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to a circular prestressed support system and an assembling method for the construction of subway connecting passages. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In the current stage of subway construction, the shield tunneling method is widely used due to its advantages of high excavation efficiency, small environmental disturbance and advanced and reliable machinery. As a fire evacuation project between the up and down lines of the subway, the communication channel plays an important role in tunnel connection, drainage and fire protection. Its construction includes drilling, freezing, pipe opening, excavation, and grouting. It is characterized by high construction risk and many cross operations. [0004] The inventors fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/28
CPCE21D11/18E21D11/28E21D11/183
Inventor 陶莉莉高昇王保群董旭许传敏
Owner SHANDONG JIAOTONG UNIV
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