Steel-concrete combined-assembly-type bridge bent frame pier system and construction method

Abstract

The invention relates to a steel-concrete combined-assembly-type bridge bent frame pier system and a construction method. The system comprises a pier foundation, hollow steel pipe concrete dual-columnpiers on the upper face of the pier foundation, an I-shaped steel horizontal collar beam between the dual-column piers, a steal cover beam at the tops of the dual-column piers, a supporting base on the upper surface of the steel cover beam and a main beam on the upper surface of the supporting base. The hollow steel pipe concrete dual-column piers are composed of stainless steel pipes and interlayer plain concrete, the circles of the inner and outer layers of the hollow steel pipe concrete dual-column piers are coaxial, the whole dwarf pier is prefabricated, and the high pier is divided intoa lower segment, a middle segment and an upper segment for segment prefabricating; the whole steel cover beam is prefabricated by stainless steel pipes with rectangular cross sections, internal prestressed reinforcement and plain concrete. The junctions of the prefabricated piers and the pier foundation are subjected to local cast-in-place, all the segments are locally embedded, and all the junctions are welded and connected through bolts. The dual-column bridge bent frame pier anti-seismic system is adopted and can also be used as a multi-column bent frame pier system. The bent frame pier system belongs to the field of bridge engineering. The system is convenient to construct and environmentally friendly.

Description

technical field [0001] The invention relates to a bridge structure system, in particular to a novel steel-concrete composite assembled bridge bent pier system, which belongs to the field of bridge engineering. Background technique [0002] The existing bridge bent pier structure system generally consists of pier columns upright on the pile foundation, cover beams fixed above the pier columns, and transverse tie beams arranged between the pier columns, and the pier columns, cover beams and transverse tie beams The beams are all reinforced concrete members. Such a structure exhibits serious earthquake damage problems in earthquakes, such as concrete crushing and spalling, buckling and exposure of steel bars, etc. Generally, the bent frame is improved by improving the performance of concrete and steel bars or increasing the size of the members. The aseismic performance of the bent pier structure is seldom improved and optimized through the improvement and optimization of the st...

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Problems solved by technology

[0003] The traditional bridge bent pier structure adopts the construction method of in-situ pouring, which shows problems such as slow construction speed, time-consuming and labor-intensive work, poor quality, environmental pollution and insufficient seismic performance of the structure.

With the rapid development of my country's economy, prefabricated segment assembly technology has shown good development prospects in the field of bridge engineering in my country, such as convenient construction, high efficiency, good quality, and green environmental protection. However, it is currently mainly used in the upper structure of bridges. Few applications in structures and limited technology

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