Bridge Deck Seamless Expansion Device and Its Construction Method Based on Stiffened Slabs

Abstract

The invention discloses a stiffened joint-crossing plate based bridge deck jointless expansion device and a construction method thereof. The expansion device comprises a prefabricated expansion assembly and an expansion joint filler filled layer filled above the prefabricated expansion assembly, wherein the prefabricated expansion assembly is arranged on an expansion joint reserved between every two adjacent girder segments, and a sliding layer is laid on a girder exposed segment of each girder segment; the prefabricated expansion assembly comprises a stiffened joint-crossing plate and two wave-shaped expansion plates. A construction method for an expansion device to be repaired comprises the steps of cleaning an original bridge expansion device, constructing reserved mounting grooves, constructing the sliding layers, carrying out field assembly and mounting on the prefabricated expansion assembly and constructing the expansion joint filler filled layer. A construction method for an expansion device to be constructed comprises the steps of prefabricating the prefabricated expansion assembly, carrying out field assembly on the prefabricated expansion assembly, constructing the sliding layers, mounting the prefabricated expansion assembly and constructing bridge deck pavement structures and the expansion joint filler filled layer. The stiffened joint-crossing plate based bridge deck jointless expansion device and the construction method thereof have the advantages that the design is reasonable, the construction is convenient, the use effect is good, and multiple problems of the existing expansion devices can be solved.

Description

technical field [0001] The invention belongs to the technical field of bridge expansion joint construction, and in particular relates to a bridge deck seamless expansion device and a construction method based on a stiffening type spanning joint plate. Background technique [0002] The bridge expansion device is a device installed at the expansion joint of the bridge deck in order to make the vehicle pass through the bridge deck smoothly and meet the needs of the bridge deck deformation. The expansion device is the weakest link in the bridge structure. Since the expansion device directly bears the impact of repeated loads on the wheels, even if there is a small unevenness, it will be subjected to a large impact under the load of the vehicle, so it is also The most vulnerable to damage and need repair replacement. Slight defects and deficiencies in design or construction will lead to early damage, which not only directly makes bridge passers-by feel uncomfortable and lacks a ...

AI Technical Summary

Problems solved by technology

The expansion device is the weakest link in the bridge structure. Since the expansion device directly bears the impact of repeated loads on the wheels, even if there is a small unevenness, it will be subjected to a large impact under the load of the vehicle, so it is also Most vulnerable to damage requiring repair and replacement

Slight defects and deficiencies in design or construction will lead to early damage, which not only directly makes bridge passers-by feel uncomfortable and lacks a sense of security, but sometimes also affects the normal use of the bridge structure itself

The reason for the general damage of the expansion device is that in addition to the increase in traffic flow and the increase in heavy vehicles (the impact effect is significantly increased), the design, construction and maintenance cannot be ignored. Moreover, the bridge deck has a sudden change in stiffness at the position of the expansion joint, and it is traveling at a high speed. Under the repeated action of vehicle load, its service life is seriously affected

Therefore, the vulnerability of bridge telescopic devices has always been a major problem in road traffic

But at present, the research on seamless structure is still in its infancy, with few structural forms and limited application.

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