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Prefabricated Box Girder Transverse Prestressed Strand Installation Structure of Slab Girder Bridge

A technology for lateral prestressing and installation of structures, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as affecting viewing, interrupting road traffic, and invading the road clearance below, improving horizontal integrity, prolonging service life, saving energy effect of investment

Inactive Publication Date: 2016-05-18
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing reinforcement technology is to stretch the transverse prestress along the bottom plate of the box girder to ensure the overall stress of each box girder. This reinforcement method exposes the prestress tendons, which affects the view, and may invade the clearance of the road below. Removing the bridge deck or opening grooves on the bridge deck to install transverse prestressed tendons, this method increases the difficulty of construction, and the road traffic needs to be interrupted during construction

Method used

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  • Prefabricated Box Girder Transverse Prestressed Strand Installation Structure of Slab Girder Bridge
  • Prefabricated Box Girder Transverse Prestressed Strand Installation Structure of Slab Girder Bridge
  • Prefabricated Box Girder Transverse Prestressed Strand Installation Structure of Slab Girder Bridge

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Embodiment 1

[0019] Embodiment one, such as figure 1 , figure 2 and image 3 As shown, the prefabricated box girder transverse prestressed strand installation structure of the slab girder bridge includes prefabricated box girders 1 arranged side by side, each prefabricated box girder 1 is prefabricated or drilled with transverse through holes 7 at the same position, and all the side-by-side Or part of the prefabricated box girders 1 corresponding through holes 7 are pierced with high-strength prestressed strands 2, and the two ends of the high-strength prestressed strands 2 are respectively fixed by anchors 3 to all the prefabricated box girders 1 side by side.

[0020] The high-strength prestressed strands 2 are horizontally arranged in a row at the lower part of the prefabricated box girder 1 .

[0021] The through hole 7 of each prefabricated box girder 1 is preset with a guide tube 4, and the high-strength prestressed strand 2 is threaded in the guide tube 4, and two adjacent guide ...

Embodiment 2

[0028] Embodiment two, such as Figure 4 As shown, the difference between this embodiment and the first embodiment is that the high-strength prestressed strands 2 are horizontally arranged in a row at the upper part and the lower part of the prefabricated box girder 1 respectively.

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Abstract

A precast box girder transverse prestress stranded wire mounting structure of a plate girder bridge comprises precast box girders arranged side by side. Transverse through holes are precast at the same position of every precast box girder, high-strength prestress stranded wires penetrate into the corresponding through holes of all or part of the precast box girders arranged side by side, and two ends of the high-strength prestress stranded wires integrally fix all the side-by-side precast box girders respectively through anchorage devices. According to the precast box girder transverse prestress stranded wire mounting structure, transverse integrity of the plate girder bridge is improved, the service life of the bridge is prolonged, and the investment is saved. If transverse prestress needs adjusting or the high-strength prestress stranded wires need replacing in the using process of the plate girder bridge, traffic does not need interrupting.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to a prefabricated box girder transverse prestressed strand installation structure of a slab girder bridge. Background technique [0002] At present, the prefabricated assembled box girders of bridges are connected by hinge joints, and the construction quality of narrow and deep hinge joints cannot be guaranteed, and the connection between the new and old concrete between the hinge joint concrete and the prefabricated beam concrete is the weak point. Under the action of vehicle load (especially overloaded vehicles), the hinge joints are easy to crack, and then rainwater seeps in, which accelerates the damage of the hinge joints. The damaged hinge joints are easy to cause "single plate stress", so that the box girder breaks under the load of the vehicle. The existing reinforcement technology is to stretch the transverse prestress along the bottom plate of the box girder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D2/04E01D101/28
Inventor 魏建东娄淑景张昭何振华刘亚琼冯敬辉韩月旺马一帆
Owner ZHENGZHOU UNIV