Reaction frame prestress anchoring system and method for vertical rotating steel pipe arch on concrete bridge

Abstract

The invention belongs to a bridge project, and in particular relates to a reaction frame prestress anchoring system and a reaction frame prestress anchoring method for a vertical rotating steel pipe arch on a concrete bridge, which solve the problems that a rear anchor of a reaction frame has adverse effect on a bridge body, the rear anchor design is not flexible, a pedestal of a reaction frame influences the bridge floor and the like in the vertical rotating construction of the conventional camber combined bridge steel pipe arch. The anchoring system comprises a steel strand of which one end is connected with the reaction frame and the other end is connected with a steel box inside a side span solid section through the end part of the side span solid section of the concrete bridge, and also comprises a levelling steel plate fixed on the end part of the side span solid section, wherein concrete steel pipes are fixed on the levelling steel plate. The system and the method have the following advantages: the system and the method have no damage to the bridge floor of the bridge structure; a stress system is simple and explicit; the line shape of the bridge body is not influenced; the construction process is conveniently controlled; and the construction cost and early construction design are saved so as to ensure safety and quick construction.

Description

technical field [0001] The invention belongs to the technical field of using "beam first and then arch" in bridge engineering to build continuous rigid frame arch bridges, and in particular relates to a reaction frame prestressed anchorage system and method for vertically rotating steel pipe arches on concrete bridges. Background technique [0002] In the steel pipe arch construction of the beam-arch composite bridge, there are three methods commonly used: 1. According to the design line shape and position of the steel pipe arch, the bracket method is assembled and closed on the completed beam body; 2. The cable crane is used for hoisting , and assembled and closed according to the designed line shape and position, which is used in the construction technology field of "arch first, then beam"; 3. Use cable hoisting, and carry out bracket assembly on the completed beam body according to the designed line shape, and then use the cable hoist The tower is turned vertically, and w...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems such as the adverse effect of the rear anchor of the reaction force frame on the beam body, the inflexibility of the design of the rear anchor, and the influence of the reaction force frame pedestal on the bridge deck in the vertical rotation construction of the steel pipe arch of the existing beam-arch combined bridge, the present invention provides A prestressed anchorage system of reaction frame for vertically rotating steel pipe arches on concrete beams

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