External prestress steel structure and reinforcing means for reinforcing old bridge

Abstract

The invention provides an external prestress steel structure anchoring and steering system used for old bridge consolidation and a consolidation method thereof, which is a system applicable to prestress concrete old bridge maintenance and consolidation and a consolidation method thereof. The system comprises a steel structure anchoring system and a steel structure steering system, an anchor bold used for strengthened steel plate in the steel structure anchoring system is connected with a steel anchor box on the bridge span concrete surface of the old bridge, the steel anchor box comprises an anchor backing plate, a diaphragm plate, a stiffened steel plate, a force transfer steel plate and an external chain penetrating the steel pipe, etc. The steel structure steering system comprises a steel truss bracket and a steering gear, the steel truss bracket comprises an upper chord, a lower chord, a gusset plate, a diagonal rod, a vertical rod, a web member, a stiffened plate and a substrate steel plate, etc., the gusset plate, the stiffened plate and the substrate steel plate are connected with the bridge span concrete surface of the old bridge through the anchor bolt, the steering tube is externally sheathed with a traversing tube and an outer thimble, and a lead penetrates the center of the tube. The steering system has strong intensity, small volume and light weight; the system isorganically connected with the old bridge and the problems of shear breakdown of the joint face and the after-shrinkage and creep do not exist; and the construction does not disrupt the traffic.

Description

technical field [0001] The invention relates to a maintenance and reinforcement system suitable for prestressed concrete old bridges. Background technique [0002] Over the past two decades, my country's transportation infrastructure has developed rapidly, and a large number of prestressed concrete bridges have been built. After years of operation and use, many prestressed concrete bridges have suffered from various diseases, and some bridges have even become dangerous bridges. It is a very important and necessary work to repair and reinforce these spans without interrupting the existing traffic. [0003] Theory and practice have proved that it is a very effective reinforcement measure to repair and strengthen existing prestressed concrete bridges by stretching externally prestressed steel tendons, mainly because stretching externally prestressed steel tendons is an active reinforcement The method is to add external loads that are beneficial to the structure’s force and wo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to aim at the above-mentioned present situation, aiming to provide a structure with high strength, small volume and light weight, which can be organically connected with the old bridge span, without problems such as shear failure of the joint surface and late shrinkage and creep. It is easy to control, takes up little space at the reinforcement site, and does not interrupt traffic. The externally prestressed steel structure anchoring steering system and processing method for the reinforcement of old bridges

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