Steel beam-ultra-high performance concrete slab combined bent cap and construction method thereof

Abstract

The invention discloses a steel beam-ultra-high performance concrete plate combined capping beam, which comprises a steel beam and an ultra-high performance concrete (UHPC) plate, the steel beam comprises a bottom plate and webs, the webs are arranged on two sides of the longitudinal bridge direction of the bottom plate, the bottoms of the webs extend downwards to be provided with downward extending sections, and the UHPC plate is clamped in a cavity defined by the downward extending sections and the bottom plate. The invention further provides a construction method of the steel beam-ultra-high performance concrete slab combined cover beam. The steel beam-ultra-high performance concrete slab combined bent cap has the advantages that the hoisting weight is light, the economical efficiency is good, the beam height is easy to control, the bearing capacity is guaranteed, the rigidity meets the requirement, and assembly construction is rapid and reliable.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to a cover beam and a construction method thereof. Background technique [0002] The bridge abutment structure is an important part of the bridge structure, and in the bridge abutment structure, the cover beam is responsible for transferring the upper load, including the dead load and live load borne by the upper structure, to the lower structure and the foundation, and plays a link between the upper and lower. effect. Because the design of the cover beam needs to consider the influence of the bridge superstructure span, bridge width, vehicle load, traffic under the bridge and other factors, the unique design and construction of the cover beam is of key significance for the completion of a bridge. [0003] With the continuous advancement of China's urbanization process, the rational use of the space under the urban viaduct has attracted more and more attention of bridge ...

AI Technical Summary

Problems solved by technology

For the fully prefabricated prestressed concrete cover beam, the girder height is relatively high (the ratio of the cover beam height to its cantilever length is usually greater than 1 / 4), the utilization rate of the space under the bridge is low, and the hoisting weight exceeds 500 tons, which usually needs to be divided into stages Hoisting, on-site splicing, tensioning and prestressing in batches, complex construction

For the fully prefabricated steel cover beam, it has the advantages of light lifting weight and beam height, etc., but the steel structure is expensive, and the rigidity of the two materials at the steel-concrete joint section of the transition between the steel cover beam and the concrete pier is very different, and the force is complicated, which is easy become the weak point of the structural system

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