Cover-excavation construction method of composite wall of subway station and mobile side wall formwork trolley

A technology for subway stations and construction methods, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve problems affecting project progress, heavy workload, and long time consumption, and achieve reliable construction quality, improved construction quality, and simple operation convenient effect

Inactive Publication Date: 2015-08-05
CHINA RAILWAY 12TH BUREAU GROUP 7TH CORPORATION LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the side wall and the underground diaphragm wall of the main structure of the subway station are constructed by cover-excavation, when the laminated wall system is adopted, the main reinforcement of the beam, the main reinforcement of the slab, and the tie reinforcement of the side wall must be pre-embedded in the underground diaphragm wall. Many, and the pre-embedded bars are easily dislocated due to the inaccurate placement of the steel cages, so that the pre-embedded bars cannot be effectively connected and cannot play their due role, thus affecting the overall quality of the structure
At the same time, the station adopts the method of cover and excavation, and the side walls of the first and second floors of the basement are constructed after the top and middle slabs are completed. The concrete of the side wall is constructed by using scaffolding to set up a full hall of brackets. The side wall formwork and brackets need to be installed and disassembled repeatedly. The workload is heavy and time-consuming, which greatly affects the progress of the project. Influenced by the construction process of the method, the concrete pouring operation at the construction joint position at the connection between the side wall and the slab is very difficult and the compactness cannot be guaranteed

Method used

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  • Cover-excavation construction method of composite wall of subway station and mobile side wall formwork trolley
  • Cover-excavation construction method of composite wall of subway station and mobile side wall formwork trolley
  • Cover-excavation construction method of composite wall of subway station and mobile side wall formwork trolley

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Embodiment Construction

[0040] Figure 1 to Figure 4 Shown is an embodiment of the construction method for the superimposed wall of the subway station by cover and digging upside down according to the present invention. In the construction method of the superimposed wall of the subway station by cover and digging upside down in the present embodiment, the superimposed wall comprises a pair of underground continuous walls 100, which are designed For the top plate 200, the middle plate 300, the first-stage base plate 400 and the second-stage base plate 500 between a pair of underground diaphragm walls 100, and the side walls 600 arranged along the inside of a pair of underground diaphragm walls 100, the walls and plates are as follows Step construction:

[0041] S1: Construction of underground diaphragm wall 100;

[0042] S2: Construction of the roof 200 and the side wall 610 below the roof: chiseling and cleaning of the underground diaphragm wall 100: Excavate the foundation pit of the roof and the 2...

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Abstract

The invention discloses a covered top-down excavation subway station overlapped wall construction method and a movable side wall formwork jumbo. The construction method mainly comprises the following steps of: S1, carrying out construction of underground continuous walls; S2, carrying out construction of a top plate and side walls below the top plate; S3, carrying out construction of a middle plate, the side walls above the middle plate and side walls below the middle plate; S4, carrying out construction of the side walls at the middle section of a first ground floor; S5, carrying out construction of a primary bottom plate; S6, carrying out construction of the side walls at the middle section of a second ground floor; and S7, carrying out construction of a secondary bottom plate. According to the method, when the top plate is constructed, the side walls below the top plate are constructed; when the middle plate is constructed, the side walls above the middle plate and the side walls below the middle plate are constructed; and the method has the advantages of high construction efficiency of the side walls at the middle section and high construction quality. The movable side wall formwork jumbo mainly comprises a side wall formwork, a bracket and a movable underframe; the side wall formwork is provided with a concrete pouring port; a chute plate is fixedly arranged above the side wall formwork; and the jumbo has the advantages of reliability of assembling quality of the side wall formwork and convenience for pouring concrete to the side wall sections at the joints of the side walls and the top plate as well as the middle plate.

Description

technical field [0001] The invention relates to a construction method of cover-dig and reverse-work subway stations and a device applied to the method, in particular to a construction method of cover-dig and reverse-work subway station composite walls and a mobile side wall formwork trolley. Background technique [0002] When the side wall and the underground diaphragm wall of the main structure of the subway station are constructed by cover-excavation, when the laminated wall system is adopted, the main reinforcement of the beam, the main reinforcement of the slab, and the tie reinforcement of the side wall must be pre-embedded in the underground diaphragm wall. There are many, and the inaccurate placement of the reinforcement cage will easily lead to the dislocation of the pre-embedded reinforcement, so that the pre-embedded reinforcement cannot be effectively connected and cannot play its due role, thus affecting the overall quality of the structure. At the same time, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/045
Inventor 王业强甘建波张学文杜湘豪唐雨崔红琴杨杰何碧波徐步齐
Owner CHINA RAILWAY 12TH BUREAU GROUP 7TH CORPORATION LIMITED
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