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Railway large-bore tunnel overhead contact built-in sliding chute construction method

A tunnel contact and construction method technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as uneven appearance, slow installation progress, low safety and durability, and achieve smooth appearance, simple reinforcement, and improved work efficiency. Effect

Active Publication Date: 2009-09-09
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology

[0003] The present invention provides a new large-section railway tunnel in order to solve the problems of slow installation progress, low safety and durability, and uneven appearance in the catenary pre-buried chute of the existing large-section railway tunnel construction method using the chemical anchoring method Construction method of catenary pre-buried chute

Method used

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  • Railway large-bore tunnel overhead contact built-in sliding chute construction method

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Embodiment Construction

[0011] A method for constructing pre-embedded chutes in railway large-section tunnel catenary, comprising the following steps: (1) Opening holes in the formwork of the lining trolley: according to the embedding position, quantity, length and spacing of the chutes in the lining, determine the position on the formwork of the lining trolley. The opening position of the positioning hole, the positioning hole is a rectangular hole, and the size is length × width = 4 × 2cm; (2) The positioning of the lining trolley: it is determined according to the distance between the catenary suspension columns, the processing length of the lining trolley and the actual construction length of the lining concrete The overlapping length of the lining trolley and the poured lining is generally 8-10cm. When measuring and setting out, the mileage control point is accurately determined on the inverted arch filling surface according to the actual construction length of the lining concrete and the total le...

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Abstract

The invention relates to the technical field of railway tunnel construction, in particular to a construction method for the pre-embedded chute of the railway large-section tunnel catenary, which solves the problems of slow installation progress, low safety and durability, and uneven appearance by using the chemical anchoring method in the existing method (1) Hole opening of the formwork of the lining trolley; (2) Positioning of the lining trolley: (3) After the positioning of the lining trolley, adjust the stroke of the hydraulic cylinder of the console formwork at the arch of the lining trolley to the minimum position; (4) Remove the stirrups at the position where the chute is placed and its surroundings; (5) Adjust the position of the chute on the formwork of the lining trolley so that both ends of the chute are aligned with the positioning holes, and then connect the chute to the lining through T-head bolts The formwork of the trolley is fixed; (6) the disassembled stirrups are then installed; (7) the formwork of the lining trolley is jacked up and concrete is poured. The invention is simple in operation and reinforcement, and has improved work efficiency; the embedded parts and concrete are closely combined, and the appearance is smooth and beautiful; there is no need for additional machines, tools and personnel, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of railway tunnel construction, in particular to a construction method for a catenary pre-embedded chute in a large-section railway tunnel. Background technique [0002] It is well known that the pre-embedding process of the catenary of large-section railway tunnels plays a very important role in the entire construction process. Now the most commonly used embedded part is the slideway groove, which can withstand a tensile force of 22KN, which can fully meet the requirements of the catenary. For the load inherited by the suspension column, the pre-embedded foundation of the catenary suspension column adopts two channels welded together in parallel through flat steel, and the method usually used for the embedded slideway groove is the chemical anchoring method. In actual use, it needs to be erected and installed The process of rigging, sending additional personnel to dig grooves, installing embedded parts, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10
Inventor 鲍海荣郭银新赵华锋马南丰
Owner CHINA RAILWAY 12TH BUREAU GRP
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