Method for changing pot bearing by enlarging pier section

Abstract

The invention relates to the technical field of bridge engineering, and especially relates to a method for changing a pot bearing by enlarging a pier section. The method comprises the following steps: 1, enlarging the pier top section within a certain height range of the pier; 2, placing a lifting jack on the pier top with an enlarged section to jack the beam body, then, temporarily supporting the beam by a steel washer block, and taking out the lifting jack; 3, detaching the pot bearing at the pier top, leveling the bottom surface of the beam body, pasting wedge-shaped steel plates with concrete and adhesives, and fixing and limiting the steel plates by angle steels around; 4, pouring a cushion at the pier top; 5, setting two plate type rubber bearings in parallel on the pier top, supporting the beam body by the lifting jack, detaching the temporarily supporting steel washer block, laying down the beam, removing the lifting jack away, and finishing the change work. The method is free from building a temporary support for supporting the beam body, the pot bearing can be changed again very conveniently after being changed, traffic cannot be interrupted during construction, social influence is reduced greatly, the economic efficiency is high, harm to the original structure is extremely low, and the carrying capacity of corresponding components is improved further.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method for increasing the section of a bridge pier and replacing a basin-type bearing. Background technique [0002] The main function of the support is to transmit the supporting reaction force of the upper structure, including vertical force and horizontal force, and at the same time ensure the free deformation of the structure under the action of factors such as live load, temperature change, concrete shrinkage and creep. On many existing bridges, due to factors such as product quality, design selection, construction and installation, and maintenance and repair, a large number of pot bearings have serious problems and hidden dangers, and because the upper and lower steel plates of the pot bearings need to pass through steel bars Or the anchor bolt is connected to the concrete, and it is more difficult to replace the plate bearing. [0003] Commonly used replaceme...

AI Technical Summary

Problems solved by technology

This method is good for the bearings, but the pot bearings that are not leveled at the bottom of the beam are applicable, but the bearings of many bridges are not caused by construction and installation errors, but are completely unusable due to quality and other problems and must be replaced , so the scope of application of this method is quite limited, and it is not suitable for pot bearings that have been severely damaged. Moreover, since the steel plate is combined with concrete through an organic material such as bonding glue, whether its durability can support the service life of the bearing remains to be proved.

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