Temporary prestressed tension pedestal and lifting point integrated structure of section beam and construction method of section beam

Abstract

The invention discloses a temporary prestressed tension pedestal and lifting point integrated structure of a section beam and a construction method of the section beam. The integrated structure comprises the temporary prestressed tension pedestal and lifting point integrated structure arranged on the section beam; the temporary prestressed tension pedestal and lifting point integrated structure comprises a bottom plate installed on the section beam, a temporary prestressed tension pedestal mechanism installed on the bottom plate and a lifting hole mechanism installed on the bottom plate; the temporary prestressed tension pedestal mechanism comprises a pair of anchor plates installed on the bottom plate in the direction of a transverse bridge, the lifting hole mechanism comprises a pair ofribbed plates with lifting holes mounted on the bottom plate in the direction of a bridge, the two anchor plates face each other, the two ribbed plates with lifting holes face each other and are located between the two anchor plates, the two ends of the ribbed plates with lifting holes are respectively connected with the anchor plates at the corresponding ends of the ribbed plates with lifting holes, the upper ends of the ribbed plates with lifting holes are provided with the lifting holes in the middle, the lifting holes of the ribbed plates with two lifting holes are opposite to each other,the anchor plates are provided with beam piercing holes penetrated by temporary prestressed twisted steel bars, and the beam piercing holes on the two anchor plates are opposite each other.

Description

technical field [0001] The invention relates to the field of segmental beams, in particular to an integrated structure and construction method of a temporary prestressed tensioning pedestal and a lifting point of a segmental beam. Background technique [0002] In the process of modern bridge construction, segmental prefabricated assembly technology has been more and more applied and promoted due to its advantages of economy, high efficiency and environmental protection. The prefabricated segments are manufactured in the prefabrication yard, and later transported to the bridge site for assembly. The assembly process includes multiple processes such as lifting, trial assembly, application of epoxy resin glue, tensioning temporary prestressing, through holes, tensioning permanent prestressing, and pipe grouting. After the epoxy glue is applied to the segment, a certain temporary pre-pressure needs to be applied to the glue joint to make the epoxy glue solidify under pressure. ...

AI Technical Summary

Problems solved by technology

Segmental hoisting holes and temporary tensioning pedestals are usually set separately, which are respectively used for temporary prestressing during segmental hoisting and segmental assembly. More holes need to be reserved on prefabricated segments. These tunnels should be avoided when stressing pipelines. If they cannot be avoided, the steel bars of the segmental beams need to be cut off, and spiral bars or reinforcement meshes need to be set up for local reinforcement, which not only increases the difficulty of segmental beam construction, but also affects the steel bars of segmental beams. Integrity, which increases the workload of the post-hole sealing, if the quality of the hole sealing is poor, it will increase the risk of water seepage on the bridge deck during the later operation period

Images