Highly-permanent connection mode for prefabricated pier body and cushion cap of cross-sea bridge

Abstract

A high-durability connecting method of a prefabricated pier shaft with a cushion cap of a bridge spanning the sea, relates to a big bridge pier with high-durability connecting between the prefabricated pier shaft and foundation in the sea corrosion environment; wherein, the prefabricated pier shaft, the cushion cap are connected with wet connector concrete in the middle, the under-part of the prefabricated pier shaft is provided with a flaring transition section and a straight line section, the reservation steel bars of the prefabricated pier shaft in the middle of the wet connector concrete are connected with the reservation steel bars of the cushion cap by double side welding, and a water-seal rubber strip is arranged between the prefabricated pier shaft and the cushion cap. The wet connector concrete is isolated with the sea corrosion environment by a prefabricated pier shaft wall, which puts an end to the situation that the injurious ingredient in the sea invades into the inner of the wet connector; the body of the prefabricated pier shaft is prefabricated in a land factory, therefore, the quality can be controlled effectively and the probability of the surface crack occurrence is lowered; employing the corrosion prevention system can greatly improve the self-durability of structure and effectively block corrosion channels, therefore, the service life of structure can be extended.

Description

technical field [0001] The invention relates to a bridge pier with a high-durability connection mode between the bridge prefabricated pier body and the foundation under the marine corrosion environment. Background technique [0002] With the development of economy and society, the construction of cross-sea bridges is in the ascendant. Considering that most of the general sea-crossing bridges are non-navigable bridges and are located in the sea area, the construction operation area is relatively windy, high waves, rapid flow, frequent occurrence of typhoon natural disasters and other specific bridge construction conditions, in order to reduce the workload of offshore cast-in-place , Reduce the risk of offshore construction operations, ensure the construction quality, and speed up the construction progress. The pier body construction of the non-navigation hole bridge of the cross-sea bridge generally adopts the method of integral prefabricated hoisting, and then connected with...

AI Technical Summary

Problems solved by technology

[0003] The prefabricated piers and foundations of domestic cross-sea bridges built and under construction have surface cracks to varying degrees, which affect the appearance quality; at the same time, in the marine environment, substances harmful to structures such as chloride ions are easy to corrode the structure through surface cracks. inside the structure, forming corrosion channels and reducing the service life of the structure

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