Rigid-framed arch bridge reinforcing structure and method

Abstract

The invention discloses a rigid-framed arch bridge reinforcing structure and method. The reinforcing structure comprises arch pieces, prefabricated carriageway plates, wet joints and steel-structure cross tie beams. One steel-structure cross tie beam is newly fabricated between every two adjacent arch pieces, the prefabricated carriageway plates are erected on the arch pieces, and the arch pieces, the steel-structure cross tie beams and the carriageway plates are connected into a whole by means of cast-in-situ of the wet joints. According to the rigid-framed arch bridge reinforcing structure and method, the transverse integrity of the bridge is improved, the stress of the main arch pieces is improved, the bridge bearing capacity is improved, and the problem that the rigid-framed arch bridge is poor in integrity can be fundamentally solved.

Description

technical field [0001] The invention belongs to the field of bridge reinforcement, and in particular relates to a reinforcement structure and method of a rigid frame arch bridge capable of improving structural stress. Background technique [0002] Rigid-frame arch bridges have the advantages of beautiful appearance, light weight, convenient construction and hoisting, and low cost. They were built in large numbers in my country in the 1970s and 1980s. However, with the rapid development of the domestic economy, the traffic volume of highways continues to increase, and the load on bridges is increasing. The structural defects of rigid-frame arch bridges that are integrated and distributed are becoming more and more prominent. The problems of poor structural integrity and insufficient bridge bearing capacity are common. Threats to driving safety, urgently need to be reinforced. [0003] The arch pieces of the rigid frame arch bridge are connected as a whole by transverse beams...

AI Technical Summary

Problems solved by technology

The integrity of this structure is poor, and the more typical diseases include: deflection in the middle span of the main arch, cracking and damage of the slightly curved plate, cracking at the root of the transverse beam, and weakening of the connection with the arch, etc.

[0004] Reinforcement of rigid-frame arch bridges is difficult, and reinforcement measures generally take the method of repairing any defects, such as replacing slightly bent plates, replacing transverse beams, re-casting bridge deck pavement, etc., but this kind of treatment can only cure the symptoms, not the root cause Diseases tend to recur

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