Method for filling hinge joint of fabricated prestressed hollow beam slab

Abstract

The invention provides a method for filling a hinge joint of a fabricated prestressed hollow beam slab, and belongs to the technical field of bridge engineering. The method comprises the steps as follows: inserting a screw type blocking strip into a bottom gap of the hinge joint, wherein the top surface of the screw type blocking strip comprises two split parts, one part is lapped on the other part, the length of the lapping position is 3-5 cm, and rubber strips are arranged on wing plates on the two sides of the screw type blocking strip; filling the middle of the hinge joint with micro-expansion concrete; when the concrete of the hinge joint reaches enough age period, filling the top of the hinge joint with bituminous grout; and when the bituminous grout reaches the design performance, pouring a pavement layer on the top surface of the hollow beam slab. When the micro-expansion concrete is poured, the top surface of the screw type blocking strip is open, so that the space of a vertical column is communicated with that of the hinge joint and the screw type blocking strip is stabilized by the rubber strips on the wing plates and the self weight of the concrete of the hinge joint; and the middle of the hinge joint is filled with the micro-expansion concrete, so that the space of the hinge joint is closed for a long time and the problem of water seepage due to premature failure of the hinge joint is solved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a hinge joint filling method of an assembled prestressed hollow beam slab. Background technique [0002] Prefabricated prestressed hollow beam-slab structures account for a relatively high proportion of small and medium-span bridges in my country. Adjacent beams and slabs are connected as a whole by cast-in-place concrete, and each beam and slab jointly bears the load on the roadway slab. However, during the survey of the conditions of the active hollow beams and slabs, it was found that under the action of factors such as natural environmental loads, traffic loads, and material performance degradation, the phenomenon of premature failure of hinge joints is quite common. There are obvious traces of water seepage, and some slab bottoms have peeled off aggregates. The two phenomena of water seepage at hinge joints and stress on the veneer promote each other ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a method for filling hinge joints of assembled prestressed hollow beam slabs, which can solve the problem of premature failure of hinge joints

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