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Opening reserving device for subway monolithic track bed concrete and construction method thereof

A technology of integrated ballast and reserved openings, applied in the field of engineering science, can solve the problems of concrete construction quality decline, slow construction progress, concrete moisture segregation, etc., and achieve the effect of simple and feasible combined structure, easy installation and disassembly, and reduced transportation costs

Pending Publication Date: 2019-12-03
HUAHAI ENG CO LTD OF CREC SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the concrete transportation of the integral track bed of the underground line is transported from the track laying base to the construction operation point. The distance from the track laying base to the construction surface is long, and segregation and water loss are prone to occur when transporting concrete, and the quality of concrete construction is reduced; from the track laying base to the construction site The working face time is long and the construction progress is slow. Therefore, it is a very urgent subject to study the device and treatment method of the concrete reserved opening of the subway integral track bed.

Method used

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  • Opening reserving device for subway monolithic track bed concrete and construction method thereof
  • Opening reserving device for subway monolithic track bed concrete and construction method thereof
  • Opening reserving device for subway monolithic track bed concrete and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Refer to Fig. 1(a), Fig. 1(b), Fig. 1(c), Fig. 1(d), Fig. 1(e), Fig. 1(f), the concrete opening is reserved in the station shield well, and the When capping the end well, use φ300mm steel pipes to form reserved openings on the roof of the platform floor and the station hall floor respectively. The outer wall of the steel pipe is welded with φ14 steel bars, and at the same time, the steel bars extend into the structural concrete of the roof structure for no less than 200mm and are welded with the structural steel pipes. Weld the base steel plate at the bottom of the steel pipe, and at the same time pass the embedded bolt through the base steel plate and weld it to the steel pipe. Specifically, in this embodiment, the embedded bolt is composed of a horizontal section and a vertical section, and the horizontal section One end is connected with the steel pipe, the other end of the horizontal section is connected with the upper end of the vertical section, the lower end of t...

Embodiment 2

[0037] See Figure 2(a), Figure 2(b), Figure 2(c), Figure 2(d) and combine image 3 and Figure 4 , when not using the station end well to reserve the concrete opening, use a flange to fix and seal the top of the steel pipe at the top of the discharge channel to prevent rainwater from entering, and cover it with a concrete cover to ensure road traffic. When it is necessary to use the reserved opening, apply to the traffic control department for temporary occupation of the road for construction. Connect the first pre-embedded pipe structure on the station hall floor and the second pre-embedded pipe structure on the station hall floor with steel pipes of the same diameter, so as to connect them to the reserved opening on the ground, and reserve a certain length of steel pipes on the station hall floor to expose To the lower side of the top floor of the station so that the distance between the nozzle and the ash port of the tank truck connected to the underground line to the concr...

Embodiment 3

[0039] After the reserved opening is used up, the connecting steel pipe connecting the platform floor and the station hall floor is removed, and at the same time, a circular steel plate with a diameter of φ300mm is welded to the bottom of the pre-embedded steel pipe structure at the platform floor and the station hall roof, and the micro-expansion concrete Backfill the pre-embedded steel pipes, and install rubber waterstops and flanges at the bottom of the steel pipes through pre-embedded bolts, and set a waterproof protective layer on the top of the steel pipes by coating waterproof paint as a concrete protective layer. Finally, the structural surface and the road surface are chiseled. After chiseling, brush 2mm thick waterproof paint and lay linoleum to form a protective layer. The thickness of the protective layer is not less than 8cm.

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Abstract

The invention relates to the technical field of engineering science, in particular to an opening reserving device for subway monolithic track bed concrete and a construction method of the opening reserving device for the subway monolithic track bed concrete. The opening reserving device for the subway monolithic track bed concrete comprises an embedded pipe structure. The embedded pipe structure comprises a steel pipe. The steel tube is provided with a plurality of connection reinforcing steel bars in the circumferential direction in an outward extending manner. The embedded pipe structure comprises a first embedded pipe structure buried on a station hall layer and a second embedded pipe structure buried on a platform layer. The bottom of the first embedded pipe structure and the top of the second embedded pipe structure are connected through an inclined connection pipeline. Compared with the prior art, the opening reserving device for the subway monolithic track bed concrete is of a composite structure which is simple and practicable, and the opening reserving device is easy to mount and demount. The opening reserving device for the subway monolithic track bed concrete and the construction method have the advantages that by the adoption of the method reserving a concrete opening and a concrete transportation pipeline on a station shield shaft within every range of 5 km - 6 kmof the underground line, the defects existing in the long-distance concrete transportation process are overcome, the ground reserved opening, the first embedded pipe structure and the second embeddedpipe structure guarantee the construction progress, transportation cost can be effectively lowered, and the transportation quality of the concrete can be guaranteed at the same time.

Description

technical field [0001] The invention relates to the field of engineering science and technology, in particular to a device and a construction method for a concrete reserved opening of an integral track bed of a subway. Background technique [0002] The scale of domestic subway construction continues to expand, and the quality and progress of subway track laying construction are critical. In order to improve the progress of underground track laying, the overall track bed concrete transportation time is one of the key factors restricting construction. When the underground line adopts the "rail laying method" construction, the concrete of the track bed is transported by a concrete tanker in the rail laying well of the track laying base, and then transported to the construction work surface. The track laying base generally has a track laying mileage of 7 to 8 kilometers per double track. At present, the concrete transportation of the integral track bed of the underground line is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E04G15/06
CPCE02D29/045E02D29/04E04G15/063
Inventor 徐明发段德荣卢龙华刘庆伟钱琨
Owner HUAHAI ENG CO LTD OF CREC SHANGHAI
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