Bidirectional prefabricated segment splicing construction method for large-sized underpass

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

Active Publication Date: 2015-10-28
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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  • Bidirectional prefabricated segment splicing construction method for large-sized underpass
  • Bidirectional prefabricated segment splicing construction method for large-sized underpass
  • Bidirectional prefabricated segment splicing construction method for large-sized underpass

Examples

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 section 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 bidirectional prefabricated segment splicing construction method for a large-sized underpass and belongs to the technical field of traffic engineering. A closed frame structure of the underpass is formed through splicing by adopting the prefabricated segment splicing construction method. Shear keys are arranged on longitudinal splicing surfaces and vertical splicing surfaces respectively. Splicing seams are bonded through structural adhesives. Pressure is formed for vertical splicing by means of self-weight. The vertical splicing seams are provided with connecting steel plates. The connecting steel plates are welded to pre-embedded steel plates of upper segments and lower segments after bonding is completed. Temporary pre-stressing force is set for longitudinal splicing. Large-segment post-tensioning permanent pre-stressing force is longitudinally formed, so that the integrality of each large segment is guaranteed for a long time. Factory-like prefabrication of the prefabricated segments is adopted and carried out in synchronization with excavation of a foundation pit. Thus, certain-scale urban road reconstruction bringing traffic interference seriously influencing production and life in the construction period is carried out smoothly, the construction duration is greatly shortened, the on-site construction progress is promoted, the number of construction procedures of on-site formwork erection, reinforcing steel bar cutting, binding and welding, concrete pouring and the like is substantially reduced, and dust and noise pollution to perimeter zones is reduced.

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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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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