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The construction method of connecting and connecting the new underground excavation passage with the existing station hall floor

A construction method and channel technology, applied in tunnels, earthwork drilling, tunnel lining, etc., can solve the problems of stress redistribution of old and new structures, stress concentration at breakout openings and easy instability, etc., to ensure safety and stability, and ensure the stability of construction structures Effects on construction safety

Active Publication Date: 2021-12-10
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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AI Technical Summary

Problems solved by technology

On the one hand, the release of stress when there is a structural breach in the construction link will lead to stress concentration at the breached opening and make it easy to lose stability; on the other hand, after the connection structure is completed, the stress of the new and old structures will be redistributed, and the connection part is still a weak part

Method used

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  • The construction method of connecting and connecting the new underground excavation passage with the existing station hall floor
  • The construction method of connecting and connecting the new underground excavation passage with the existing station hall floor
  • The construction method of connecting and connecting the new underground excavation passage with the existing station hall floor

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Embodiment Construction

[0034]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the embodiments of the present invention and should not be construed as limitations of the present invention.

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Taking the structure of a subway crossing transfer line in a certain city as an example, a roof reinforced ring beam 101 is installed at the vault interface of the newly added tunnel, with a size of 450mm*800mm. The upper two rows of main ribs are 8C22, waist ribs 2C22, and stirrups A12@ 150, between the new and old structures 150mm*300mm plum blossom arrangement 850mm long...

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Abstract

The invention discloses a construction method for the connection and connection between the newly added underground excavation channel and the existing station hall floor. The existing side wall of the station hall layer is the construction method used to realize the connection with the newly added underground excavation passage. In order to ensure the safety and stability of the structure, the existing tunnel side walls were demolished under the condition of erecting a full house. The existing tunnel side wall is cut by block and step-by-step wire saw cutting, and the split blocks are broken under the principle of demolition and support. The connection side wall removal method adopted by the invention ensures the stability and safety of the construction structure from multiple angles, and minimizes the impact on the existing track lines.

Description

technical field [0001] The present invention relates to a connection and connection interface method for shallow-buried urban underground space, in particular to a connection and connection interface form between a newly added underground excavation channel and an existing station hall floor in a shallow-buried urban underground space, which belongs to the connection technology of urban rail transit field. Background technique [0002] With the development of the economy and the change of the form of the times, urban conflicts such as the poor operation ability of the existing subway and the congestion of the existing underground space broke out. The development and expansion of underground space is an effective measure to alleviate the bottleneck of urban development, thus triggering the expansion of the existing structure. need. The usual method used in construction is to build a new structure first, and then break down the side walls of the old structure at the junction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/00E21D11/38
CPCE21D9/001E21D9/008E21D11/10E21D11/00E21D11/38
Inventor 雷升祥代敬辉黄欣张京京赵静波冀国栋陈一夫岳长城陈霞飞彭澍陈自龙高飞鹏
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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