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Construction structure and construction method of a cast-in-situ box girder prestressed steel tendon

A technology of prestressed steel beam and box girder, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as the inability to meet construction conditions, and achieve the effect of simple structure, speeding up the progress of the project, and shortening the construction period.

Inactive Publication Date: 2019-01-08
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When constructing cast-in-place box girders for viaducts with small curve radius, the traditional bellows positioning and tensioning methods can no longer meet the construction conditions

Method used

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  • Construction structure and construction method of a cast-in-situ box girder prestressed steel tendon
  • Construction structure and construction method of a cast-in-situ box girder prestressed steel tendon

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with accompanying drawing, so that those skilled in the art can understand more clearly, as figure 1 and figure 2 As shown, the present invention adopts the following scheme, including the skeleton steel bar 1 of the box girder, and the construction structure also includes a bellows 2, a prestressed steel beam 3, and several limit steel bars 4, and the space limit steel bar 4 is fixed on the frame steel bar 1 Above, the corrugated tube 2 is placed in the limit steel bar 4, and the corrugated tube 2 is set on the prestressed steel beam 3. The limiting steel bar 4 includes a left section 41, a middle section 42 and a right section 43, the left section 41 and the right section 43 are L-shaped, the middle section 42 is U-shaped, and the bellows 2 is located in the middle section 42. The left section 41 and the right section 43 are welded on the skeleton reinforcement 1. The opening direction o...

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Abstract

The invention discloses a construction structure and a construction method of a cast-in-situ box girder prestressed steel tendon. The construction structure further comprises a bellows, a prestressedsteel bundle and a plurality of limit bars, wherein the limit bars are fixed on the frame bars, the bellows is arranged in the limit bars, and the bellows is sleeved on the prestressed steel bundle; the construction structure comprises a box girder skeleton steel bar, a prestressed steel bundle and a plurality of limit bars. The limiting steel bar comprises a left section, a middle section and a right section, wherein the left section and the right section are L-shaped, the middle section is U-shaped, the bellows is located in the middle section, and the left section and the right section arewelded on the skeleton steel bar. The opening direction of the middle section of the limiting steel bar is away from the curvature center of the bellows at the limiting steel bar. The invention can limit the curvature of the bellows and the steel bundle inside the bellows at the bending position of the box girder, so that the curvature of the box girder meets the building requirements, the structure is simple, safe and reliable, the installation is convenient, the engineering progress is accelerated, the construction period is shortened, and the construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of building bridge construction, in particular to a construction structure of a cast-in-place box girder prestressed steel beam and a construction method thereof. Background technique [0002] As my country's urbanization process is gradually accelerating, more and more urban viaducts are being built, and urban land resources are tight, and small-curve-radius viaducts are also a future development trend. Completing the construction of the viaduct is a problem that engineers must face and solve. When constructing cast-in-place box girders for viaducts with small curve radius, the traditional bellows positioning and tensioning methods can no longer meet the construction conditions. Therefore the present invention proposes a construction structure and construction method of cast-in-place box girder prestressed steel strands, which has been applied in practice, solved construction problems, accelerated the progr...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 张世康王瀚陶家长
Owner CHINA MCC17 GRP
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