Road bridge prefabricated small box girder type invisible cap beam temporary support system and construction method thereof

Abstract

The invention discloses a road bridge prefabricated small box girder type invisible cap beam temporary support system and a construction method thereof. The support system comprises a main beam, a main pier supporting system and a side pier supporting system, wherein the main beam is arranged along the transverse side of a road bridge pier; the main pier supporting system is arranged on the transverse side of a main pier area and located below the main beam, the lower end of the main pier supporting system is fixed with a main pier bearing platform, and the upper end of the main pier supporting system is fixed with the main beam; and the side pier supporting system is arranged on the transverse side of a side pier area and located below the main beam, and the lower end of the side pier supporting system is fixed with a side pier bearing platform, and the upper end of the side pier supporting system is fixed with the main beam. Therefore, the support system only has a large cross-diameter support beam (main beam) between the transverse main pier area and the side pier area, and other support systems arranged in the vertical direction are not present, so that a vehicle operation space is provided, and disassembly and assembly of the prefabricated small box girder type invisible cap beam support system are convenient. In addition, the support system has the characteristics of highbearing capacity so as to meet the supporting requirements of the prefabricated small box girder type invisible cap beam.

Description

technical field [0001] The invention relates to a road and bridge support system, in particular to a road and bridge temporary support system for prefabricated small box girder type concealed cover girders. [0002] The present invention also relates to a construction method of the above-mentioned prefabricated small box girder type concealed cover girder temporary support system for road bridges. Background technique [0003] Generally, the estimated cost of using cast-in-place box girders for main bridges of the same area is greater than the estimated cost of using prefabricated small box girders. Therefore, in terms of cost savings, choosing prefabricated small box girders for road and bridge deck construction can greatly reduce construction costs , At the same time, this construction method can also shorten the construction period. [0004] When the bridge deck of the road bridge is constructed with prefabricated small box girders, a number of parallel prefabricated sma...

AI Technical Summary

Problems solved by technology

Since the support system is designed for the road and bridge construction where the main bridge is a PC hollow slab girder (span 20m, girder height 90cm, single girder weight 22.2 tons), the main bridge is a prefabricated small box girder (90 tons / piece , which is more than three times that of the PC hollow slab girder), such a support system is not applicable due to the limitation of the bearing capacity; in addition, more importantly, the support system is limited to the range of the bearing platform, and In the truss system adopted, in order to reduce the length ratio of the main support column, the support area is provided with dense rods. During construction, vehicles (used to carry the components of the support system or prefabricated small box girders) cannot pass through, thus increasing the The disassembly and assembly of the support system and the inability to improve the construction efficiency of the bridge deck by increasing the transportation capacity

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