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A two-way prefabricated segment assembly method for large-scale underpass

A large-size, large-segment technology, applied in the field of two-way prefabricated segmental assembly of large-scale underpasses, can solve the problems of increased construction difficulty, high labor intensity, and slow progress, and achieve construction quality assurance, reduce interference, The effect of speeding up the construction progress

Active Publication Date: 2016-04-27
XIAMEN MUNICIPAL ENGINEERING DESIGN INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the progress of the cover-excavation method or the new Austrian method is slow, labor-intensive and risky, and the corresponding construction difficulty is also increasing

Method used

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  • A two-way prefabricated segment assembly method for large-scale underpass
  • A two-way prefabricated segment assembly method for large-scale underpass
  • A two-way prefabricated segment assembly method for large-scale underpass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figure 1-4 As shown, the closed prefabricated section is a single hole prefabricated section, which includes an inverted U-shaped prefabricated section 1, a U-shaped prefabricated section 2, a shear key 3, a shear keyway 4, a pre-embedded steel plate 5, a corrugated The pipe 6 and the steel plate waterstop 7, the lower end of the inverted U-shaped prefabricated section 1 is matched and spliced ​​with the upper end of the U-shaped prefabricated section 2, and the shear force key 3 and the shear force keyway 4 are used to cooperate at the splicing surface. The pre-embedded steel plate 5 is arranged at the end of the inverted mountain-shaped prefabricated section 1 and the mountain-shaped prefabricated section 2, and the bellows 6 is arranged at the right angle between the inverted U-shaped prefabricated section 1 and the U-shaped prefabricated section 2 , the steel plate waterstop 7 is arranged inside the inverted U-shaped prefabricated segment 1 and the U-shaped...

Embodiment 2

[0062] Such as Figure 5-9 As shown, the closed prefabricated section is a double-hole prefabricated section, which includes an inverted mountain-shaped prefabricated section 8, a mountain-shaped prefabricated section 9, a shear key 3, a shear keyway 4, a pre-embedded steel plate 5, a corrugated The pipe 6 and the steel plate waterstop 7, the lower end surface of the inverted mountain-shaped prefabricated section 8 and the upper end surface of the mountain-shaped prefabricated section 9 are matched and spliced, and the shear force key 3 and the shear force keyway 4 are used to cooperate at the splicing surface. The pre-embedded steel plate 5 is arranged at the end of the mountain-shaped prefabricated section 8 and the mountain-shaped prefabricated section 9, and the bellows 6 is arranged at the end of the mountain-shaped prefabricated section 8 and the mountain-shaped prefabricated section 9. At the right angle, the steel plate waterstop 76 is arranged inside the inverted moun...

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Abstract

The invention discloses a two-way prefabricated section assembly method for a large-size underpass, which belongs to the technical field of traffic engineering. The closed frame structure of the underpass is spliced ​​by a prefabricated assembly construction method, and shear keys are arranged on the longitudinal and upper and lower splicing surfaces. The splicing seams are glued with structural glue, the upper and lower splices use their own weight to form pressure, and the upper and lower joints are equipped with connecting steel plates. After the glue is completed, they are welded with the pre-embedded steel plates in the upper and lower segments. Temporary prestress is set for longitudinal splicing to form a large segment Post-tensioning permanent prestressing ensures the long-term integrity of large sections. The prefabricated sections adopt factory prefabrication and are carried out synchronously with the excavation of the foundation pit, so that urban roads with a certain scale and traffic interference during the construction period have a greater impact on production and life. It has been carried out smoothly, greatly shortening the construction period, speeding up the on-site construction progress, greatly reducing the construction procedures such as on-site formwork, steel bar cutting, binding and welding, and concrete pouring, and reducing dust and noise pollution to surrounding areas.

Description

technical field [0001] The invention belongs to the technical field of traffic engineering, and in particular relates to a method for assembling and constructing two-way prefabricated segments of a large-size underpass. Background technique [0002] The construction method of open-cut and cast-in-place is generally adopted for shallow-buried underpasses in cities. However, its impact on the surrounding environment is very large, and it greatly interferes with urban life. The application is limited by various factors, especially when the ground traffic and the environment do not allow it. A large number of construction processes such as on-site formwork, steel bar cutting, binding and welding, and concrete pouring are carried out. The construction period is long, the on-site construction progress is slow, and the construction period has a great impact on traffic. [0003] Although the cover-excavation method or the new Austrian method is currently used instead of the cut-and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/045E02D15/02
Inventor 傅重龙高庆丰吴俊杰黄国苏贺喜
Owner XIAMEN MUNICIPAL ENGINEERING DESIGN INSTITUTE CO LTD
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