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Connection design and construction method for newly-built subway entrance and exit and existing fabricated street underpass

A construction method and street-crossing technology, applied in roads, roads, buildings, etc., to achieve the effect of saving engineering investment, good promotion significance, and saving underground space resources

Inactive Publication Date: 2016-12-07
CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, this requires designers to fully develop ideas, not only to achieve functional requirements, but also to ensure the safety of engineering construction, which is a very serious challenge for design and construction

Method used

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  • Connection design and construction method for newly-built subway entrance and exit and existing fabricated street underpass
  • Connection design and construction method for newly-built subway entrance and exit and existing fabricated street underpass
  • Connection design and construction method for newly-built subway entrance and exit and existing fabricated street underpass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1-5 As shown, a new subway entrance and exit and the existing prefabricated cross-street connection design and construction method are carried out according to the following steps:

[0029] (1) Before the excavation of the temporary shaft 3, perform grouting treatment within 0.5m around the shaft, and backfill and grout the area affected by the construction under the floor of the existing crossing street 2, and strictly control the grouting pressure not greater than 0.3MPa;

[0030] (2) In the existing crossing street 2, the Shuangpingong 25a door frame beam protection system is used to protect the prefabricated foyer crossing the street to ensure the safety of the existing crossing street 2;

[0031] (3) Plant bars on the outer wall of the existing crossing street 2 structure, and pour the connecting ring frame bottom plate, that is, first form a reinforced ring beam support system, and then remove the existing structure;

[0032] (4) Use rhinestones t...

Embodiment 2

[0035] Such as Figure 1-5 As shown, a new subway entrance and exit and the existing prefabricated cross-street connection design and construction method are carried out according to the following steps:

[0036] (1) Before the excavation of the temporary shaft 3, perform grouting treatment within 2m around the shaft, and backfill and grout the area affected by the construction under the floor of the existing crossing street 2, and strictly control the grouting pressure not greater than 0.3MPa;

[0037] (2) In the existing crossing street 2, the Shuangpingong 25a door frame beam protection system is used to protect the prefabricated foyer crossing the street to ensure the safety of the existing crossing street 2;

[0038] (3) Plant bars on the outer wall of the existing crossing street 2 structure, and pour the connecting ring frame bottom plate, that is, first form a reinforced ring beam support system, and then remove the existing structure;

[0039] (4) Use rhinestones to ...

Embodiment 3

[0042] Such as Figure 1-5 As shown, a new subway entrance and exit and the existing prefabricated cross-street connection design and construction method are carried out according to the following steps:

[0043] (1) Before the excavation of the temporary shaft 3, perform grouting treatment within 5m around the shaft, and backfill and grout the area affected by the construction under the floor of the existing crossing street 2, and strictly control the grouting pressure not greater than 0.3MPa;

[0044] (2) In the existing crossing street 2, the Shuangpingong 25a door frame beam protection system is used to protect the prefabricated foyer crossing the street to ensure the safety of the existing crossing street 2;

[0045] (3) Plant bars on the outer wall of the existing crossing street 2 structure, and pour the connecting ring frame bottom plate, that is, first form a reinforced ring beam support system, and then remove the existing structure;

[0046] (4) Use rhinestones to ...

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Abstract

The invention belongs to the field of building structures and particularly relates to a connection design and construction method for a newly-built subway entrance and exit and an existing fabricated street underpass. The method is characterized by comprising steps as follows: (1) grouting treatment is performed on the periphery of a vertical shaft before the temporary vertical shaft is excavated, and back-filling grouting is performed on an area, affected by construction, under a bottom plate of the existing street underpass; (2) pre-propping protection is performed on a fabricated hallway of the street underpass; (3) steel bars are embedded in an outer wall of an existing street underpass structure, and a ring frame bottom plate is cast and connected; (4) a reinforced concrete structure in an opening range is cut; (5) finally, the reinforced concrete structure at a connecting port is constructed, and waterproof treatment of the connecting port is well performed. The subway entrance and exit and the existing street underpass are integrated reasonably and effectively, by the aid of the existing street underpass, passenger flows can be attracted in a large range, the project investment can be greatly saved, underground space resources of a city are saved, and a good project case is provided for design and planning of subway entrances and exits in future.

Description

technical field [0001] The invention belongs to the field of building structures, and in particular relates to a design and construction method for the connection between a new subway entrance and an existing prefabricated crossing street. Background technique [0002] With the rapid development of urban rail transit, the contradictions between subway construction and surrounding ground and underground structures, municipal pipelines under roads and ground transportation have become increasingly prominent. The functional positioning of the subway determines that the subway station is generally built in the bustling neighborhood or the main road of the city. The land resources are very precious, and it can be said that every inch of land is very expensive. In order to build a subway entrance and exit, it is often necessary to change a large number of municipal pipelines, cause the demolition of buildings on the ground, affect urban traffic, etc., and the cost is quite expensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E01C1/00
Inventor 孙俊利徐福东任玉瑾张美琴张金伟马文
Owner CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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