Construction method of three-span bridge tail beam feeding bridge girder erection machine

Abstract

The invention discloses a construction method of a three-span bridge tail beam feeding bridge girder erection machine. The construction method comprises the steps that S1, a first bracket, a temporarysupport, tail auxiliary supporting legs, a sliding device and a main beam longitudinal moving pushing device are installed; S2, a main beam is hoisted to the temporary support; S3, a front supportingleg, a tail auxiliary supporting leg joist, a rear supporting leg, a crown block and a lifting appliance of the crown block are installed, and a bridge girder erection machine is assembled and debugged; S4, a first middle pier top section and a second middle pier top section are hoisted and fixed; S5, the crown block is used for hoisting a first set of standard sections and a second set of standard sections to be spliced to the first middle pier top section and the second middle pier top section correspondingly, and glue splicing, prestress tensioning and prestress pipeline mud jacking are conducted alternately; S6, all the standard sections are hoisted, glue splicing is completed, and wet joint construction is conducted on a mid-span bridge body; and S7, the beam end sections on the sidespans are spliced to form a complete bridge deck. According to the construction method, when the bridge girder erection machine carries out girder feeding operation, glue splicing, prestress tensioning and prestress pipeline grouting are alternately and synchronously carried out on the standard sections of the first middle pier and the second middle pier, and the construction period can be shortened.

Description

technical field [0001] The invention relates to the technical field of bridge construction. More specifically, the present invention relates to a construction method of a bridge erecting machine. Background technique [0002] In the construction of high-speed railway / highway, the bridge erecting machine has been widely used in the construction of erecting railway bridges and highway bridges, which has improved the construction quality, but there is a shortcoming of low work efficiency in the construction process of the bridge erecting machine of the prior art. When the bridge erecting machine feeds the beam, after the hoisting, gluing, prestressing tension and prestressing pipeline grouting of a group of segments are completed, the hoisting, gluing, prestressing tensioning and prestressing of the second group of segments are carried out The pipeline is grouted and then hoisted in sequence to complete all segments, which takes a long time. Therefore, designing a constructio...

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Problems solved by technology

[0002] In the construction of high-speed railway / highway, the bridge erecting machine has been widely used in the construction of erecting railway bridges and highway bridges, which has improved the construction quality, but there is a shortcoming of low work efficiency in the construction process of the bridge erecting machine of the prior art. When the bridge erecting machine feeds the beam, after the hoisting, gluing, prestressing tension and prestressing pipeline grouting of a group of segments are completed, the hoisting, gluing, prestressing tensioning and prestressing of the second group of segments are carried out The pipeline is grouted, and then all sections are hoisted in sequence, which takes a long time

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