Curved steel beam jacking system and construction method

Abstract

The invention provides a curved steel beam jacking system and a construction method. The bottom of the steel beam is provided with a pulley and a connecting plate with holes. The connecting plate with holes and the pushing plate are connected by bolts, and the pulley is arranged on a curved track. , according to the length of the fixed-curvature curve track, a track support pier is set at a certain distance. The pushing support pier is set under the steel beam. The middle part of the building is provided with a second jacking pier, and a pair of three-dimensional jacking jacks are arranged on each of the jacking piers. Ultra-thin vertical jacks are set on the pier.

Description

Technical field [0001] The present invention relates to the field of top push construction of curved steel beams, and in particular, the top push construction of curved steel beams with a certain slope. Background technique [0002] The box girder is also called a steel box beam, which is a common form of structurally used in large span bridges. It is generally used on a large bridge between span, and is called a steel box beam due to the exterior like a box. In the large-span cable support bridge, the span of the main beam of the steel box reached a few hundred meters or even thousands of meters, which is generally divided into several beam sections manufacturing and installation. Because the top push construction method does not affect the transportation of the bridge and is easy to ensure the periodic construction, construction quality and construction progress of the beam section on the fixed site. Therefore, the installation construction of urban bridges, long-term bridges, ...

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Problems solved by technology

[0003] However, the jacking construction method also has some shortcomings. In the traditional jacking construction, it is often necessary to set a guide beam, and there are many restrictions on the geometric shape of the bridge structure, which cannot be obtained in the construction of curved beam axes and variable slope bridges. good application

In addition, due to the constant changes in the force of the bridge span structure during the pushing process, the height of the beam and the amount of materials will be increased, which is time-consuming and labor-intensive, and greatly increases the cost

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