Prestressed hollow slab beam end air bag reinforcing construction method
A hollow slab girder and construction method technology, applied in bridge reinforcement, bridge, bridge maintenance, etc., can solve problems such as difficulty in guaranteeing reinforcement effect, reinforcement by enlarging cross-section method, complex construction process, etc., and the quality and progress can be easily controlled and improved The effect of carrying capacity and mature technology
Inactive Publication Date: 2015-10-21
THE FIRST ENG CO LTD OF CTCE GRP
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Problems solved by technology
It is usually necessary to set up formwork on the outer surface of the component when using the enlarged section method for reinforcement. The construction process is complex and difficult, and the reinforcement effect is difficult to guarantee.
For hollow slab bridges with a large number of surfaces, due to the small hinge joint size, the bearing capacity is generally increased by increasing the thickness of the hollow slab roof. This method is difficult to take advantage of the reinforcement method of increasing the section
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[0015] Refer to the attached drawing, the construction method of prestressed hollow slab beam end airbag reinforcement, opening holes and setting airbags at the beam end, pouring self-leveling concrete around the beam body, increasing the cross-sectional area, and improving the bearing capacity of the bridge. The specific construction method is as follows:
[0016] Use an air compressor and a pneumatic pick to open the manhole 1 on the roof of the hollow slab. The size of the manhole 1 is 0.5m×0.6m. Bending around, adopting rhinestones to set vent holes on both sides, with a diameter of 4cm, arranged near the relatively high end of the two ends of the airbag 4; the two ends of the airbag 4 are reinforced with 24 brick walls 2 in the range of 3m. A horizontal brace is placed every 40cm on the bottom surface, and φ12U-shaped positioning steel bars 3 are arranged above the horizontal brace according to the horizontal position of the airbag. The water gun washes the debris inside ...
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The invention discloses a prestressed hollow slab beam end air bag reinforcing construction method. The beam end is provided with an opening and an air bag, self-leveling concrete is poured around the beam, the cross-sectional area is increased, and the carrying capacity of the bridge is improved. The prestressed hollow slab beam end air bag reinforcing construction method is simple in principle, high in feasibility and practicality, low in cost and mature in process, and the quality and progress can be controlled easily.
Description
technical field [0001] The invention relates to a construction method for improving the service performance of a bridge, more specifically, a method for increasing the cross-section and improving the bearing capacity of a beam body by adopting beam end airbag reinforcement. Background technique [0002] With the improvement of the road network in many developed countries in the world, the number of new roads and bridges has gradually decreased, and the repair, maintenance, reinforcement and transformation of existing roads and bridges have become the focus of the work of the transportation department. There are many methods of bridge reinforcement, such as increasing section method, transverse connection method, external prestressing method, plate replacement method, etc. It is usually necessary to set up a formwork on the outer surface of the component when using the enlarged section method for reinforcement. The construction process is complex and difficult, and the reinfo...
Claims
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IPC IPC(8): E01D22/00
Inventor 袁静方威王敬东黄亚军胡振辉
Owner THE FIRST ENG CO LTD OF CTCE GRP