Prefabricated assembly method of long-span cover beam and its large-span cover beam

A prefabricated assembly and large-span technology, applied to bridges, bridge parts, bridge construction, etc., can solve the problems of long construction period, low construction efficiency, slow construction speed, etc., achieve civilized construction guarantee, reduce traffic pressure, reduce concrete volume Reduced effect

Active Publication Date: 2017-09-12
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the existing large-span cap beams are erected, it is necessary to build a temporary support on the auxiliary road below to reproduce the pouring of concrete, etc. from the beginning of erection.
In this way, during the construction period, the following auxiliary roads will be restricted, which will not only cause traffic inconvenience, but also make the already congested urban traffic worse.
[0004] Therefore, the erection of the existing large-span cap beams not only easily causes traffic jams at the construction site, but also the construction speed is slow (usually at least 1-2 months), so the construction period is long and the construction efficiency is low.

Method used

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  • Prefabricated assembly method of long-span cover beam and its large-span cover beam
  • Prefabricated assembly method of long-span cover beam and its large-span cover beam
  • Prefabricated assembly method of long-span cover beam and its large-span cover beam

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Effect test

Embodiment 1

[0033] The purpose of the present invention is achieved through the following technical solutions: as Figure 1 to Figure 9 As shown, the prefabricated assembly method of the large-span cover beam provided in this embodiment generally adopts the method of batch precast pouring to achieve the construction without support, and the entire construction process of the large-span cover beam without support is gradually carried out in the following three stages :

[0034] The first stage:

[0035] like Figure 1 ~ Figure 3 As shown, a U-shaped beam member 12 is prefabricated, the lower half of the prefabricated U-shaped beam member has a rectangular cross-section, and a U-shaped notch 13 is formed on the U-shaped beam member 12 . Furthermore, the support of the large-span cover beam 1 is pre-embedded with a solid cross-section column casing to enhance the load-bearing strength of the beam.

[0036] The total weight of the prefabricated components at this stage is about 210t. After...

Embodiment 2

[0050] Based on the large-span cap beam prefabricated assembly method of above-mentioned embodiment 1, as figure 1 As shown, the present embodiment also provides a large-span cover beam 1, at the bottom of the large-span cover beam 1 is formed a prefabricated component (i.e. the aforementioned prefabricated U beam member 12), and the prefabricated member is formed with a U-shaped notch 13 for subsequent in-situ pouring of concrete in the hollow part (see figure 1 shown).

[0051] like Figure 7As shown, the large-span cover beam 1 erected by the prefabricated assembly method of the large-span cover beam of the above-mentioned embodiment 1 has a total length of 31.9m, a rectangular cross section, and the height and width of the large-span cover beam are respectively 3.0 m and 3.0m. Moreover, the total volume of the large-span cap beam 1 of the present invention is about 300m 3 , with a total weight of 780t.

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Abstract

The invention discloses a large-span capping beam prefabrication and assembly method and a large-span capping beam; according to the large-span capping beam prefabrication and assembly method, overall no-bracket construction of the large-span capping beam is carried out by adopting staged prefabricated casting on the whole and gradually tensioning steel beams in all stages; the method comprises the stages of S1, prefabricating a U-shaped beam component as a bottom die; forming a U-shaped rabbet in the U-shaped beam component, and tensioning at least four prestressed steel beams on the U-shaped beam component for reserving porous channels for subsequent prestressed tensioning; S2, after the U-shaped beam component is hoisted in place, casting a hollow part of the U-shaped rabbet in a way of cast-in-situ, and correspondingly tensioning at least six prestressed steel beams for reserving porous channels for subsequent prestressed tensioning; S3, casting the rest part of a cross section of the lower half part of the beam component in a way of cast-in-situ, and correspondingly tensioning at least ten prestressed steel beams; S4, completing the construction. After the large-span capping beam prefabrication and assembly method is adopted, not only is the construction efficiency high, but the traffic pressure is also greatly reduced. Furthermore, compared with the existing construction method, the large-span capping beam prefabrication and assembly method is also very environment-friendly.

Description

technical field [0001] The invention relates to the field of municipal bridge construction, in particular to a prefabricated and assembled method for a large-span cover beam and the large-span cover beam. Background technique [0002] In order to speed up the construction of modern cities, with the large-scale development of municipal projects, more and more attention has been paid to the impact of construction project quality, construction efficiency and traffic on construction sites. [0003] However, when the existing large-span cap beam is erected, it is necessary to build a temporary support on the auxiliary road below to repeat pouring concrete etc. due to starting from the erection. In this way, during the construction period, the following auxiliary roads will be restricted, which will not only cause traffic inconvenience, but also make the already congested urban traffic worse. [0004] Therefore, the erection of the existing large-span cap beams not only easily ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D19/00
CPCE01D19/00E01D21/00
Inventor 闫兴非周良朱敏周振兴杨昀
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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