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Subway station air duct temporary support dismantling method

A temporary support, subway station technology, applied in tunnels, earthwork drilling, tunnel lining, etc., can solve problems such as hidden safety hazards, construction economy, safety drawbacks, inability to support support, etc., to increase quality and improve construction. Efficiency, the effect of simplifying the steps of dismantling braces

Pending Publication Date: 2022-07-29
CHINA RAILWAY 19 BUREAU GRP CO LTD +1
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  • Abstract
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Problems solved by technology

[0004] After the temporary support is removed, the structure needs to be constructed from bottom to top, and it will take about 50 days at the fastest. Since the temporary support has been completely removed, during this period, once the initial support structure of the air duct is deformed, it cannot be backed up. It can be seen that the traditional CRD temporary support removal method has disadvantages in terms of construction economy and safety.

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  • Subway station air duct temporary support dismantling method
  • Subway station air duct temporary support dismantling method
  • Subway station air duct temporary support dismantling method

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Embodiment Construction

[0038] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments may be combined with each other under the condition of no conflict.

[0039] Many specific details are set forth in the following description to facilitate a full understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, and Not all examples.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these Any such actual relationsh...

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Abstract

The invention relates to the technical field of tunnel construction, in particular to a subway station air duct temporary support dismantling method. Comprising the following steps that a second horizontal temporary support of the CRD method is dismantled, support replacement construction is conducted in a segmented mode, after bottom plate filling layers and concrete layers of all the segments are chiseled away, vertical temporary supports below the top face of the first bottom plate filling layer are dismantled, a first waterproof protection layer is constructed, and support replacement pieces are arranged on the first waterproof protection layer; a horizontal temporary support is arranged on the support changing piece of the first section, a vertical temporary support below the top face of the bottom plate filling layer in the next section range is cut off, a second waterproof protection layer is constructed, waterproof and support changing construction of all the sections is completed according to the support changing method, and the bottom plate concrete layer, the bottom plate filling layer, the construction middle plate and the side wall of each section are constructed and filled. And the first horizontal temporary support and the vertical temporary support in the CRD method are removed, the arch lining and the vertical temporary support below the middle plate are removed, and segment construction is completed. According to the method, the support changing length is increased, and the construction period is shortened.

Description

technical field [0001] The present disclosure relates to the technical field of tunnel construction, in particular to a method for dismantling a temporary support for an air duct of a subway station. Background technique [0002] At present, the CRD method is mainly used for the excavation of the air ducts of the subway underground excavation stations in China. CRD is to use a vertical middle wall and 2 horizontal temporary supports to divide the entire air duct vault into 6 sections for construction. The upper section is first, the interrupted section follows closely, and the lower section is constructed last. The subway station has a waterproof grade of one. The temporary support is required to be removed during the structural construction. The temporary support is removed because the cross-section is between 15.5-17m, and the height of the cross-section is large. [0003] During the construction of the structure, the construction is carried out from top to bottom. Before...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10E21D11/12E21D11/38E21F1/00
CPCE21D11/003E21D11/10E21D11/105E21D11/12E21D11/38E21F1/00
Inventor 阳凯范晓明王建辉李红霞邹丰元李吉林
Owner CHINA RAILWAY 19 BUREAU GRP CO LTD
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