Construction method for arch springing of arch cover type subway station

Abstract

The invention discloses a construction method of an arch springing of an arch cover type subway station. An arch foot support and a base formwork are adopted for construction, the arch foot support comprises three square timbers arranged at the bottom and a plurality of triangular supports fixedly connected to the upper portions of the three square timbers, the base formwork comprises a wood rubber plate and a plurality of back ridges connected to the bottom of the wood rubber plate, and the base formwork is fixedly arranged on the upper portions of support oblique beams of the triangular supports. The two base formworks are longitudinally symmetrical, a steel-edged water stop belt is clamped between the two base formworks, two layers of extruded sheets are laid on the upper portions of the base formworks, the lower end of the waterproof plate is folded outwards and then clamped between the two layers of extruded sheets, and the upper end of the steel-edged water stop belt is hung on an arch steel bar through an iron wire. And the reserved sleeve connected with the arch reinforcing steel bar is embedded in the extruded sheet. According to the method, the reinforced concrete secondary lining reserved sleeve can be protected against pollution and position deviation, the line type of the steel-edged water stop belt can be controlled, and the waterproof plate can be prevented from being damaged in follow-up procedure construction.

Description

technical field [0001] The invention relates to a construction method for an arch-covered subway station arch foot, and belongs to the technical field of subway station construction. Background technique [0002] When the second lining is constructed at the arch foot of the arch-covered station, due to the constraints of small space and difficult operation at the arch foot, the following common quality problems are prone to occur: [0003] 1. When the second lining steel bar is connected mechanically with a straight thread sleeve, it is easy to cause the sleeve to be polluted by cement slurry due to insufficient protection, so that the steel bar cannot be effectively connected; [0004] 2. The line shape of the steel edge waterstop at the construction joint is poorly controlled, and it is easy to cause the steel edge waterstop to shift after concrete pouring; [0005] 3. During the excavation of the lower steps, there is damage to the waterproof board reserved for the water...

AI Technical Summary

Problems solved by technology

[0003] 1. When the second lining steel bar is connected mechanically with a straight thread sleeve, it is easy to cause the sleeve to be polluted by cement slurry due to insufficient protection, so that the steel bar cannot be effectively connected;

[0004] 2. The line shape of the steel edge waterstop at the construction joint is poorly controlled, and it is easy to cause the steel edge waterstop to shift after concrete pouring;

[0005] 3. During the excavation of the lower steps, there is damage to the waterproof board reserved for the waterproof construction of the arch

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