Construction support and method for overhead large-span heavy-duty cross beam

Abstract

The invention discloses a construction support and method for an overhead large-span heavy-duty cross beam. The construction support comprises a lower bracket supporting structure, an upper bracket supporting structure located above the lower bracket supporting structure, and a middle supporting structure with the bottom supported on the lower bracket supporting structure. The top face of the upper bracket supporting structure is flush with the top face of the middle supporting structure, and the upper bracket supporting structure and the middle supporting structure form a temporary supporting platform for supporting the cross beam to be constructed. A load bearing structure is erected on the temporary supporting platform. The construction method comprises the steps that firstly, the lower bracket supporting structure is installed; secondly, the upper bracket supporting structure and the middle supporting structure are installed; thirdly, the load bearing structure is erected; fourthly, the support is prepressed; fifthly, the upper cross beam is constructed; and sixthly, the support is removed. According to the construction support and method, design is reasonable, construction is easy and convenient, the using effect is good, and the problems that as for an existing floor steel pipe supporting system, cost is high, the erection process is complex, the construction period is long, the construction risk is high, the requirement for supporting stability is high, and the construction progress of the upper cross beam is affected can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a high-altitude large-span heavy-load beam construction support and a construction method. Background technique [0002] Generally, the construction of the upper beam of a cable-stayed bridge (that is, the upper beam of the cable tower of a cable-stayed bridge) has the characteristics of heavy load, high altitude, and large span. The construction of the upper beam often becomes the most difficult project in the construction of the entire tower column. The existing construction method generally adopts the floor-standing steel pipe support system (that is, the vertical support system). In order to ensure the construction safety of the upper beam structure and meet the force requirements, the floor-type steel pipe support is mostly based on the lower beam. When steel pipe piles are erected, the cable towers are used as attachments for support every time a cer...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-altitude large-span heavy-duty beam construction support for the above-mentioned deficiencies in the prior art. The support system has problems such as high cost, complex erection process, long construction period, high construction risk, high support stability requirements, and influence on the construction progress of the upper beam.

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