Cast-in-place concrete bridge steel wire rope supporting formwork instead of ground support formwork

Abstract

The invention discloses a cast-in-place concrete bridge with a ground supporting framework replaced with a steel wire rope stress towing framework. Reinforced concrete structures with widths of 0.4m are further added at the positions, level to the ground surface, of two bridge piers and along the thickness direction of the two bridge piers. Reinforced iron pieces are enabled to be exposed above the surface by 0.2 m after being pre-buried in the structures to serve as connection fastening pieces, steel wire ropes are utilized to lift a framework body to the position of the cast-in-place concrete bridge through a winch or a hoist, dozens of the steel wire ropes which are arrayed evenly are utilized to tow the framework to be placed in the middle of a span of the two bridge piers from the bottom face of the framework according to a locking position, and a framework in the middle of the span of the two bridge piers is formed. When the framework is towed, the steel wire ropes are connected with first bridge pier pre-buried iron piece connection fasteners, penetrate through a semi-circular iron frame at the top end of a first bridge pier, embrace the framework to have stress on a second bridge pier semi-circular iron frame, and then are connected with second bridge pier connection fasteners. The height position of the framework is adjusted through screw caps of the connection fasteners. A set of independent frameworks is composed of an A type framework and two B type frameworks. The width of the concrete bridge is formed through combination of a plurality of sets of independent frameworks. The length of the A type framework is 60% of the span of the two bridge piers, the length of the two B type frameworks is 40% of the span of the two bridge piers, and the width of each framework is 4m.

Description

technical field [0001] The invention relates to the field of construction, large-scale bridges and urban overpasses, and a construction process for on-site pouring of reinforced concrete bridges between the spans of two bridges. Background technique [0002] At present, in the cast-in-situ construction of building bridges, except for the cast-in-situ long-span bridges that use the rope-pull structure method, for the cast-in-place reinforced concrete construction with the span of the two bridges of the approach bridge being about 40, the ground The frame is forced to support the formwork body and the entire weight of the bridge pouring concrete. The supporting method is to use about 0.8 meters of iron pipe as the main support pillar, and then to construct the formwork body and lay the formwork. The other is to use 0.06 meters of iron. The tube is assembled into the entire main frame and the formwork body. At present, these two methods have different defects. First, the constr...

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Problems solved by technology

[0002] At present, in the cast-in-place construction of building bridges, except for the cast-in-place large-span bridges that use the rope-pull structure method, for the cast-in-place reinforced concrete construction of the two bridges with a bridge span of about 40 in the approach bridge, the ground is currently used. The frame supports the formwork body and the entire bridge weight of poured concrete. The supporting method is to use iron pipes of about 0.8 meters as the main support pillars, and then carry out the structural formwork body and lay formwork. The other is to use 0.06 meters of iron pipes. Pipes are combined to form the entire main frame and formwork body. At present, these two methods have different defects. First, the construction method is not scientific, wastes a lot of manpower, and the construction period is slow; second, especially the use of 0.06 meters of iron pipes The stability and safety of the main frame are poor, and the construction and disassembly of the formwork are cumbersome, which needs to be improved

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