A Construction Method for Consolidating Steel Box Girder and Concrete Pier of Swivel Rigid Frame Bridge

Abstract

The invention discloses a construction method for consolidation of a steel box girder and a concrete pier of a swivel rigid-frame bridge. The construction method is implemented at the following steps: 1, pre-burying prestressed steel bars when an upper rotary table or the concrete pier is constructed, when the concrete pier is constructed, an outer wrapping force transfer steel plate on the outer surface of the concrete pier, fixedly connecting shear studs II to the inner side of the outer wrapping force transfer steel plate, and preserving a pier top post-pouring section at the top of the outer wrapping force transfer steel plate; 2, after the steel box girder is in place, welding the outer wrapping force transfer steel plate and a web plate and a diaphragm plate of the steel box girder together, welding a bearing plate into the steel box girder, forming a combined concrete pouring section below the bearing plate, and fixedly connecting shear studs I to the inner sides of the web plate and the diaphragm plate of a to-be-poured pouring section; pouring micro expansion concrete; and 4 after the micro expansion concrete reaches the design strength, tensioning the prestress steel bars and anchoring the upper ends of the prestress steel bars on the bearing plate, and then completing duct grouting. According to the invention, the actual stress requirement of a small-radius curve steel box girder can be met and the safety of the bridge is improved.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for consolidating a steel box girder and a concrete pier of a swivel rigid frame bridge. Background technique [0002] The advantages of swivel bridges spanning existing busy railway lines are outstanding, with good safety, little interference to transportation, and no need for complicated cantilever assembly equipment and technology. Especially when crossing high-speed rail, it has become the preferred bridge solution. Among the swivel bridge types, the swivel rigid frame bridge is the most widely used due to its economical cost and mature technology. [0003] With the rapid development of my country's infrastructure construction, there have been many overpass bridges crossing the railway, and the ramps of urban overpass bridges are often located on small radii. Due to the lack of relevant design experience and data, the line type is often adjusted to avoid t...

AI Technical Summary

Problems solved by technology

The small-radius swivel steel box girder will generate a large lateral bending moment on the top of the concrete pier, but the existing consolidation form of the steel box girder and the concrete pier cannot meet the actual force requirements of the small-radius swivel bridge, reducing the Safety of Swivel Bridge with Small Radius

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