Multifunctional jack for erecting cross-sea bridge simply support steel beam

Abstract

The invention discloses a multifunctional jack for erecting a cross-sea bridge simply support steel beam. The multifunctional jack comprises a jack main body and an oil path system. The jack main bodyis of a hydraulic type. The oil path system communicates with a hydraulic cavity of the jack main body and comprises a first oil path and a second oil path, wherein the first oil path and the secondoil path are arranged at the two sides of the jack main body. The tail end of the first oil path is provided with an energy accumulator. A damping valve is arranged between the jack main body and theenergy accumulator. The tail end of the second oil path is provided with a hydraulic pump station. The oil path system is configured to meet the requirements that in the erecting process of the steelbeam, the second oil path is off, the first oil path is on, and the damping valve and the energy accumulator are in the working state; and after the steel beam is dropped, the second oil path is on, and the first oil path is off. The multifunctional jack is simple in structure; the jacking function of the jack main body, the buffer function of the energy accumulator and the energy consumption function of the damping valve are combined, and the buffer function and the energy consumption function required in the beam hanging process and precise adjustment of the position of the steel beam obtained after beam dropping can be achieved at the same time; the erecting efficiency of the steel beam is improved; and the remarkable effect is achieved in the practical application process of the multifunctional jack.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a multifunctional jack used for erecting simply supported steel girders of cross-sea bridges. Background technique [0002] As an important structure of cross-sea bridges, large-segment steel girders have the characteristics of high quality, high processing technology requirements, and high cost. In addition, during the construction of steel girder facilities, in order to avoid the adverse effects of the complex sea environment and reduce the construction time at sea, the scheme of prefabrication and assembly on the shore, and then floating crane erection is generally adopted. When steel girders are erected in complex sea areas, affected by environmental factors such as waves, wind, and currents, the steel girders will vibrate significantly, and when the beams fall, the steel girders collide with the brackets and related components beside the pier, which affects const...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing steel girder buffer structure cannot quickly and stably erect simply supported steel truss girders in complex sea areas

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