Assembly type bridge splicing bent cap mounting method and supporting structure

Abstract

The invention discloses an assembly type bridge splicing bent cap mounting method and a supporting structure, and the method comprises the following steps: 1, forming at least one mounting hole in thetail of a to-be-mounting bent cap, and fixedly connecting at least one connecting base to a bearing platform below a bridge; 2, hoisting the to-be-mounted bent cap to the upper end of the bridge stand column through hoisting equipment; 3, enabling a supporting rod to penetrate through the bent cap tail mounting hole, wherein the lower end of the supporting rod is fixedly connected with the connecting base on the bearing platform, the top end of the supporting rod is fixedly connected with the bent cap tail, the hoisting tool is withdrawn, and mounting of the bent cap is completed; and 4, repeating the step 3; hoisting the other bent cap and connecting the two bent caps together through pouring so as to complete mounting of the spliced bent caps; according to the mounting method, the rearanchor type and front support rear anchor type assembly type bridge bent cap mounting technology is adopted, the site construction space is reduced, normal transportation is guaranteed, constructors and construction machines are reduced, and the safety risk in construction is also reduced.

Description

technical field [0001] The invention relates to the technical field of installation of prefabricated bridge splicing cover beams, in particular to an installation method and supporting structure of prefabricated bridge splicing cover girders. Background technique [0002] The cover beams used in prefabricated bridges with two-way six lanes or more in urban viaducts are generally more than 27m long, and most of them are long cantilever structures. Splicing type, that is, after the piers are hoisted in place separately, the middle is connected into a whole with post-wetting joints. However, due to the too long boom of the single-piece cover beam, the single-piece cover beam cannot maintain its own balance after hoisting the single-piece cover beam in sequence at the installation site. Therefore, it is necessary to install temporary supports above the center of gravity to ensure the stability of the single-piece cover beam. [0003] The linear control method of the prefabricat...

AI Technical Summary

Problems solved by technology

[0004] However, the temporary support occupies the space of the road on the ground, and it cannot guarantee the passage of vehicles in the narrow section of the road; for special piers such as piers in the water where temporary supports cannot be erected on both sides, splicing cap beams cannot be installed; for high piers, corresponding measures to increase the support are required The cost is relatively high; the time for wet joints from the binding of steel bars to the removal of supports with grouting strength is as long as 17 days, so the number of supports required and the occupation of ground space are almost the same as those of cast-in-place cap beams, which does not reflect the superiority of prefabricated bridges

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