Method of Strengthening Dangerous Bridge with Steel Corrugated Plate

Abstract

The invention relates to a method for reinforcing a bridge in danger by using a corrugated steel plate. The method can effectively increase the bearing capacity of the bridge and prolongs the service life of the bridge, and has the advantages of being simple in technology and low in cost. According to the technical scheme, the method for reinforcing the bridge in danger by using the corrugated steel plate comprises the following steps of (1) foundation pad operation, (2) corrugated steel plate arch installation and (3) packing layer casting. In the step (1), two locating grooves are excavated downwards in the edge positions of the two sides of the bottom of a bridge arch ring respectively, foundation steel bars are tied in the locating grooves, a plurality of joint bars which are vertically arranged are reserved, and finally, concrete is cast into the locating grooves to form the foundation pad layer, wherein the top ends of the joint bars extend out of the foundation pad layer upwards. In the step (2), corrugated steel plate arches are pushed from the outside to enable the corrugated steel plate arches to enter bridge arch rings, the two ends of each corrugated steel plate arch are fixedly welded with the joint bars at the top end of the foundation pad layer. In the step (3), concrete is cast or mortar is sprayed in gaps between the corrugated steel plate arches and the inner circumferential faces of the bridge arch rings to form packing layers.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a bridge reinforcement method. Background technique [0002] According to statistics, about 40% of bridges in my country have a service life of more than 25 years, and the service life of these bridges is about 40 years; in the United States, bridges with a design life of 75 years have an average service life of about 40 years. However, after a survey of some concrete bridges in Germany, it was found that about 46% of the bridges with a service life of more than 25 years had at least one structural damage. [0003] The above statistical results show that in the next 5 to 10 years, my country will usher in a large-scale bridge aging phenomenon, coupled with factors such as backward design standards, inadequate construction supervision, poor operation and maintenance, and overspeeding and overloading of vehicles. Accelerated aging or structural damage of these bridges leads to a significant ...

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