Short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device and construction method

A construction method and positioning device technology are applied in the field of short-line method box girder segment prefabricated longitudinal full-length prestressed tunnel positioning devices, which can solve the problems of inaccurate positioning, poor construction quality, and uneven tunnel structure, and improve work efficiency. Efficiency, wide range of applications, and the effect of ensuring project quality

Active Publication Date: 2018-11-06
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 1ST ENG
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  • Abstract
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Problems solved by technology

[0003] The present invention aims to solve the above-mentioned deficiencies in the prior art, and proposes a prestressed channel positioning device with simple, convenient and low cost construction, and also discloses a construction method for positioning by using the device, which can improve the concrete box The positioning accuracy of the...

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  • Short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device and construction method
  • Short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device and construction method
  • Short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device and construction method

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be described below with reference to the accompanying drawings. Such as Figure 1 to Figure 7 Shown: a prefabricated longitudinal prestressed tunnel positioning device for box girder segments by short-line method, including a steel pipe 1, the diameter of the end of the steel pipe 1 is gradually reduced, the outer diameter of the steel pipe 1 is R, and the diameter of the end of the steel pipe 1 is 0.3R, a PE pipe 2 is arranged outside the steel pipe 1, and the steel pipe 1 and the PE pipe 2 together form a lining pipe, and the PE pipe 2 is movably connected in the corrugated pipe 3 embedded in the concrete, and the corrugated pipe 3 An anchor plate 4 and a spiral steel bar 5 are provided at the end of the pipe; the outer diameter of the steel pipe 1 is R, and the end diameter of the steel pipe 1 is 0.3R; the outer diameter of the PE pipe 2 is 0.7-0.8 times the inner diameter of the bellows 3 .

[0025] ...

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Abstract

The invention discloses a short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device, and meanwhile discloses a method for positioning constructionby utilizing the positioning device. The short-line-method box girder section prefabricated longitudinal full-length prestressed duct positioning device is characterized in that the positioning device comprises steel pipes (1); the end diameters of the steel pipes (1) are gradually decreased; the outer diameters of the steel pipes (1) are R, and the end diameters of the steel pipes (1) are 0.3 R;PE pipes (2) are arranged outside the steel pipes (1), and the steel pipes (1) and the PE pipes (2) together form liner pipes; the PE pipes (2) are movably connected into corrugated pipes (3) in a penetrating mode, wherein the corrugated pipes (3) are buried in concrete; and anchor plates (4) and spiral steel bars (5) are arranged at the ends of the corrugated pipes (3).

Description

technical field [0001] The invention relates to the field of prefabricated construction of large concrete beam segments, in particular to a positioning device for prefabricated longitudinal through-length prestressed tunnels of box girder segments by a short-line method, and a construction method for positioning by using the device. Background technique [0002] The side-span concrete girders of large-scale composite girder cable-stayed bridges have large spans and large volumes. Using the "short-line method segmental prefabricated assembly process" for construction can reduce the hydration heat effect of mass concrete overall pouring and improve the quality of the structure. At present, most of the concrete box girders commonly used in the world are spatially prestressed concrete structures, and the longitudinal internal beams are prestressed threaded steel bars for the entire length. When assembling segments, they need to be lengthened segment by segment, requiring high pos...

Claims

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Application Information

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IPC IPC(8): B28B23/02
CPCB28B23/022
Inventor 杨占伟赵健李春江王学民张文军于浩业张广涛彭志川朱永盛张门哲唐守峰刘春成孙长伟
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 1ST ENG
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