Deck type arch bridge vault padding unloading and reinforcing construction method and application

Abstract

The invention discloses a deck type arch bridge vault padding unloading and reinforcing construction method and application. By means of the construction method and the application, the situation that collapse is caused by unbalanced loading and unloading of a deck type arch bridge in the repairing and reinforcing process of the bridge is prevented. The construction method is characterized by including the following steps that a bridge floor is divided into an odd number of working faces from the center to the two sides of the bridge floor in the length direction of a bridge, and the width of each working face is 1000-3000 mm; firstly, the working face in the center of the bridge floor is excavated, bridge deck pavement and vault padding are unloaded, the arch back is cleaned, and a main arch ring and spandrel arch diseases are repaired and removed through slurry; afterwards, a mould is erected, and an excavated face is backfilled with plain concrete; and then the working faces on the two sides of the working face in the center are sequentially excavated until all the working faces are constructed according to the construction process and requirements of the working face in the center. By means of the construction method and the application, the deck type arch bridge can be repaired and reinforced under the condition that most structures of the original arch bridge are not changed, and construction is safe, reliable and simple; and meanwhile, the backfilling plain concrete is tightly combined with the main arch ring and spandrel arches, the thicknesses of the main arch ring and the spandrel arches are correspondingly increased, the reinforcing effect is achieved, and the construction engineering quality is improved.

Description

technical field [0001] The present invention relates to the repair and reinforcement of an arch bridge, in particular to a construction method and application for unloading and reinforcement of top arch bridge filler, and in particular to a method for preventing bridge unloading and loading in the repair and reinforcement of an upward arch bridge Construction method and application of filling unloading and reinforcement of arch top of overhanging arch bridge caused by unbalanced collapse. Background technique [0002] Overhead arch bridges include masonry arch bridges, reinforced concrete slab arch bridges, double-curved arch bridges, etc. Bridges of this type are widely used in my country, especially masonry arch bridges have a history of nearly a thousand years. In my country from the 1950s to the 1980s, with the development of the economy, reinforced concrete was widely used, and the double-curved arch bridge was rapidly promoted in the 1970s. Construction Schedule. Howe...

AI Technical Summary

Problems solved by technology

Due to the deformation of the arch rings of most arch bridges during the use of this type of bridge, the original design linearity and pressure line have changed greatly, so that during the restoration construction, due to unbalanced construction unloading or the use of large construction machines, it is easy to cause the main arch to be damaged. The reduction of the compression area and the imbalance between unloading and loading lead to bridge collapse

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