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

Abstract

The present invention relates to the art of railway tunnel construction technology, in particular to a built-in sliding chute construction method of a contact net of a railway large cross-section tunnel, which solves the problems of the prior chemical anchoring method, such as slow installation progress, low security and durability and unsmooth appearance. (1) a lining loop wheel machine template is provided with an opening; (2) the lining loop wheel machine is positioned; (3) after positioning the lining loop wheel machine, the stroke of a hydraulic cylinder of an arc control liner car template of the lining loop wheel machine is adjusted to the minimum position; (4) the hoop reinforcement in the position of the sliding chute and surrounding the sliding chute is dismantled; (5) the position of the sliding chute is adjusted on the lining loop wheel machine template so as to make both ends of the sliding chute aiming at a positioning hole and then fix the sliding chute and the lining loop wheel machine template through a T-head bolt; (6) then the dismantled hoop reinforcement is arranged; (7) the lining loop wheel machine is lifted and poured with reinforced cement. The present invention has the advantages of simple operation and strengthening, enhanced work efficiency, tight combination of built-in piece and concrete, smooth and pleasing appearance, no need of equipment and staff addition, thus greatly reducing the cost.

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...

Examples

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...

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...

Examples

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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