Fixed connection structure for steel pier column and cushion cap of portal rigid frame overbridge and construction method of fixed connection structure

Abstract

The invention discloses a fixed connection structure for a steel pier column and a cushion cap of a portal rigid frame overbridge, and a construction method of the fixed connection structure. The bottom of the steel pier column is embedded into the concrete cushion cap; column base embedded plate with a hole in the middle is arranged at the bottom end of the steel pier column; stiffening rib plates are arranged between the column base embedded plate and the steel pier column; the steel pier column is internally provided with an upper embedded plate with a hole in the middle; the top surface of the upper embedded plate is flush with the top surface of the concrete cushion cap; the steel pier column is filled with intra-column concrete; the top surface of the intra-column concrete is higher than the top surface of the concrete cushion cap; and shear studs arranged in the concrete cushion cap and the intra-column concrete are welded on the side wall of the steel pier column. The fixed connection structure is simple in structure, convenient to fabricate and install and low in cost, can transfer an internal force effectively and reliably, has good fatigue resistance and durability, reduces the work amount input at the upper part of the portal rigid frame overbridge structure, reduces the project investment, allows the structural design, construction and application to be more reasonable, and has better comprehensive economic indicators in the full life cycle of the structure.

Description

technical field [0001] The invention relates to a bridge structure of civil engineering, in particular to a joint structure form of a steel pier column and a concrete cap in an overpass structure and a construction method thereof. Background technique [0002] Pedestrian bridges are an important part of the urban landscape. On the basis of meeting the pedestrian traffic functions, they are gradually moving towards the comprehensive requirements of light structure, unique shape, large span, high bearing capacity, and convenient installation. Steel structures have gradually replaced concrete. The main material of the pedestrian bridge. Most of the current pedestrian bridges adopt the structural form of simply supported steel box girders. [0003] According to the design specification for urban pedestrian bridges and pedestrian tunnels (CJJ 69-95), when the main span of a pedestrian bridge with a simply supported steel box girder is large, the girder height will also increase ...

AI Technical Summary

Problems solved by technology

Using such a large girder height will bring a series of disadvantages: the structure is thick and the landscape effect is not good; under the premise of satisfying the 4.5-meter clearance under the bridge, the number of steps to be set for the bridge will increase, which is not humanized enough

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