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A construction method of a prestressing device for bridges without prestressing beams

A technology for applying devices and construction methods, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of low construction safety, long construction period, high construction cost, and achieve good safety controllability, short construction period, environmental protection low pollution effect

Active Publication Date: 2020-06-23
CHINA CONSTR COMM ENG GRP UNITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method of a prestress applying device for bridges without prestress beams, to solve the technical problems of long construction period, high cost and low construction safety in traditional construction methods

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  • A construction method of a prestressing device for bridges without prestressing beams
  • A construction method of a prestressing device for bridges without prestressing beams
  • A construction method of a prestressing device for bridges without prestressing beams

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Embodiment Construction

[0047] This prestress applying device for bridges without prestressed beams is arranged between the top of the pier 1 and the bottom of the steel box girder 2, and is located inside the support 13 of the pier 1 and the steel box girder 2; it includes a backing plate 3, a synchronous Hydraulic jack 4, screw jack 5, and leveling plate 6; the backing plate 3 is longitudinally arranged on the top of the pier 1, close to the position of the support 13; Each group of screw jacks 5 is arranged at intervals along the horizontal direction; the synchronous hydraulic jacks 4 have one group, and are arranged between two groups of screw jacks 5 at intervals along the longitudinal direction; Between the top of the screw jack 5 and the steel box girder 2, and the top slope of the leveling plate 6 is compatible with the slope of the bottom longitudinal slope of the steel box girder 2.

[0048] In this embodiment, the length of the backing plate 3 is not less than 160 cm, and the width of the ...

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Abstract

The invention discloses a prestressing applying device for a bridge without prestressing tendons and a construction method thereof. The prestressing applying device is arranged between the top of a pier and the bottom of a steel box girder, is located at the inner side of a support of the pier and the steel box girder, and comprises a base plate, synchronous hydraulic jacks, screw jacks and a leveling plate. The base plate is longitudinally arranged at the top of the pier and is close to the support, the two groups of screw jacks are respectively arranged at the front end and the rear end of the base plate, and each group of screw jacks are arranged at intervals along the longitudinal direction. A backing ring correspondingly sleeves the top of each screw jack, one group of synchronous hydraulic jacks are arranged between the two groups of screw jacks at intervals along the longitudinal direction,the leveling plate is in a wedge shape and is arranged between the tops of the synchronoushydraulic jacks and the screw jacks and the steel box girder in a cushioned manner, and the gradient of the top face of the leveling plate is matched with the gradient of the longitudinal slope of the bottom face of the steel box girder. According to the present invention, the technical problems that a traditional construction method is longer in construction period, high in manufacturing cost and lower in construction safety, are solved.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a construction method of a prestress applying device for a bridge without prestress beams. Background technique [0002] Steel-concrete composite continuous beam is a new type of structure developed on the basis of steel structure and concrete structure. It rationally utilizes the characteristics of high tensile strength of steel and strong compressive capacity of concrete. With the development of my country's transportation industry, the prestressing of steel-concrete composite girder bridges is generally solved by prestressing and stretching the reserved channels. The conventional construction method has a long construction period, high cost and low construction safety. Contents of the invention [0003] The purpose of the present invention is to provide a construction method of a prestress applying device for bridges without prestress beams, and to solve the technical prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 束新宇王凡林丽军顾志忠周强王建平王刚鲁荣利任新伟季宁
Owner CHINA CONSTR COMM ENG GRP UNITED
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