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Technology for solving long-term downwarping of large-span PC box girder bridge through prefabricated reactive powder concrete (RPC) columns

A box girder technology, applied in the field of prefabricated RPC (Reactive Powder Concrete) columns to solve the long-term deflection of long-span PC box girder bridges.

Active Publication Date: 2015-07-01
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experts and scholars at home and abroad have carried out a large number of experimental and theoretical studies on the deflection of long-span PC box girder bridges, but there are not many measures that can effectively control them in engineering practice. obvious

Method used

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  • Technology for solving long-term downwarping of large-span PC box girder bridge through prefabricated reactive powder concrete (RPC) columns
  • Technology for solving long-term downwarping of large-span PC box girder bridge through prefabricated reactive powder concrete (RPC) columns
  • Technology for solving long-term downwarping of large-span PC box girder bridge through prefabricated reactive powder concrete (RPC) columns

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Experimental program
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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Such as Figure 1 ~ Figure 3 As shown, the present invention mainly relates to cast-in-place ordinary concrete box girder bottom plate (1), cast-in-place ordinary concrete box girder top plate (9), prefabricated RPC columns 1-7 (2-8), and steel bar shear keys (10). During the construction of the real bridge, first prefabricated RPC columns 1~7 (2~8); before pouring the No. 0 block of the box girder bridge, put the prefabricated RPC column 1 (2) in the formwork; Pass between concrete and precast RPC columns 1(2) image 3 The steel bar shear key (10) in the bridge is connected; before the No. 1 cast-in-place block, the prefabricated RPC column 1 (2) and the prefabricated RPC column 2 (3) are connected by glue; after that, the No. 1 cast-in-place box girder bridge block. In the same way, block girder bridge No. 2 to No. 1 / 3n, No. n-2 to No. n, and the m...

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Abstract

The invention relates to a technology for lowering long-term downwarping of a large-span PC rigid frame bridge by adding prefabricated Reactive Powder concrete (RPC) Columns. The technology includes the steps of longitudinal arrangement of the first prefabricated RPC column (2), the second prefabricated RPC column (3), the third prefabricated RPC column (4), the fourth prefabricated RPC column (5), the fifth prefabricated RPC column (6), the sixth prefabricated RPC column (7) and the seventh prefabricated RPC column (8), connection between the first prefabricated RPC column (2), the second prefabricated RPC column (3), the third prefabricated RPC column (4), the fourth prefabricated RPC column (5), the fifth prefabricated RPC column (6), the sixth prefabricated RPC column (7) and the seventh prefabricated RPC column (8) and common concrete (9) of the same section and connection of the sections of the first prefabricated RPC column (2), the second prefabricated RPC column (3), the third prefabricated RPC column (4), the fourth prefabricated RPC column (5), the fifth prefabricated RPC column (6), the sixth prefabricated RPC column (7) and the seventh prefabricated RPC column (8). By means of the technology, long-time creeping downwarping of the large-span rigid frame bridge can be lowered effectively, construction is convenient to conduct and easy to implement, the cost is lower, and the technology can be widely applied to the actual design of rigid frame bridges.

Description

technical field [0001] The invention relates to the technology of adding prefabricated RPC (Reactive Powder Concrete) columns to reduce the long-term deflection of long-term PC box girder bridges, including the longitudinal arrangement of prefabricated RPC columns, the connection of prefabricated RPC columns and ordinary concrete in the same segment, and the prefabricated RPC column segments connection between. Background technique [0002] The long-span PC box girder bridge has the characteristics of strong spanning capacity, simple construction, good economy, and smooth driving, and has become the main bridge type in the world with a span range of 100m to 300m. However, after the operation of long-span PC box girder bridges, there is a common problem of mid-span deflection. The deflection exceeding the design permit poses a great threat to the durability of the structure and operational safety, which has not been solved so far. It can be said that the deflection problem h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/04E01D101/24
CPCE01D2/04E01D2101/24
Inventor 张阳鲍超刘榕唐重玺李少波陈彦羽刘海波
Owner HUNAN UNIV
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