Fabricated bridge substructure and construction method thereof

Abstract

The invention discloses a fabricated bridge substructure which comprises a foundation structure, a prefabricated bent cap and a quasi-prefabricated pier column unit, and foundation reserved vertical ribs are arranged at the top of the foundation structure; cover beam reserved vertical ribs are arranged on the lower side of the prefabricated bent cap. At least one sprue gate vertically penetrating through the prefabricated bent cap is arranged in the area covered by the reserved vertical ribs of the bent cap; a standard prefabricated pier column unit is a hollow cylinder with openings in the upper portion and the lower portion and penetrates through the foundation reserved vertical ribs to be vertically inserted into the top of the foundation structure; the prefabricated bent cap is in lap joint with the top of the standard prefabricated pier column unit and extends into the hollow area of the standard prefabricated pier column unit through the cover beam reserved vertical ribs to be connected in an inserted mode. Expansion concrete is cast in situ in the sprue gate and the hollow area of the standard prefabricated pier column unit. The construction quality can be controlled in a cast-in-place and prefabricating combined mode, investment of formworks is omitted, the weight is low, installation is convenient and rapid, the aerial work time can be effectively shortened, the construction efficiency is improved, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an assembled bridge substructure and a construction method thereof. Background technique [0002] With the continuous advancement of my country's urbanization process, the problem of traffic congestion has become increasingly prominent, and has gradually become a key factor affecting the development of urbanization. As the preferred solution to my country's traffic congestion problem, urban bridges have been widely used in large, medium and small cities in China. [0003] At present, there are two main methods of bridge construction. One is the traditional cast-in-place method, which is mainly based on manual binding of steel bars and on-site pouring of concrete. It has high safety performance and good integrity, but a large number of support formworks are required for each step of construction. , the appearance quality is not easy to control and the construction perio...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main methods of bridge construction. One is the traditional cast-in-place method, which is mainly based on artificial binding of steel bars and on-site pouring of concrete. It has high safety performance and good integrity, but a large number of support formworks are required for each step of construction. , the appearance quality is not easy to control and the construction period is long, which has a great impact on urban traffic; the second is the prefabricated assembly type, where concrete beams, slabs, columns and other components are poured and produced in the factory, and then transported to the project site for assembly. The shape is beautiful, but when connecting the various parts of the pier, due to the excessive weight of the existing prefabricated pier column, it needs unconventional large-scale equipment for lifting, and the construction is difficult

Images