Prestressed steel-concrete combined box girder suspension splicing construction device

A technology of prestressed steel and construction devices, applied in bridges, bridge parts, bridge materials, etc., can solve the problems of slow construction progress, slow construction progress, interrupted traffic, etc. for erecting supports, saving temporary construction facilities, low construction difficulty, The effect of saving construction costs

Pending Publication Date: 2021-06-25
THE SECOND ENG CO LTD OF CHINA RAILWAYSEVENTH GRP PRC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this new design allows for easy assembly without blocking up any roadways or requiring expensive equipment during installation. It also saves space by making it easier to store on site after being installed.

Problems solved by technology

This patented technical solution involves creation of a new type of prestressed reinforced plastic (PPR) material that can be used instead of regular steel tubular supports during building bridges without taking too much room out from them. Additionally, this PPR material allows for faster construction times while also being more economically efficient than current methods like cast iron tube brackets.

Method used

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  • Prestressed steel-concrete combined box girder suspension splicing construction device
  • Prestressed steel-concrete combined box girder suspension splicing construction device
  • Prestressed steel-concrete combined box girder suspension splicing construction device

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specific Embodiment approach

[0024] The specific implementation of the present invention is as follows: it includes the following hanging construction method: first, the first beam section 2 is installed on the support 1; Rolled rebar anchoring device; using finished rebar as the prestressed tendon of finished rebar to temporarily fix the second beam section 3 at both ends; welding and assembling two steel boxes so that the second beam section 3 and the first beam section 1 form a cantilever structure; Repeat the above process, and the cantilever can assemble the steel structure of the next segment.

[0025] The invention adopts fine-rolled threaded steel as the prestressed cantilever assembly construction device for the open steel box girder, which has the advantages of small construction difficulty; has the advantage of convenient cantilever construction without blocking traffic; saves construction temporary facilities and saves construction costs The advantages.

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Abstract

The invention discloses a prestressed steel-concrete combined box girder suspension splicing construction device which comprises a support, the support is provided with a first girder section, a second girder section and a second girder end which are symmetrically hoisted, the second girder end adopts a finish rolling deformed steel bar anchoring device, and two steel boxes are welded and spliced to enable the first girder section and the second girder section to form a cantilever structure. A first connecting hole and a second connecting hole are formed in a finish rolling deformed steel bar. The finish rolling deformed steel bar is used as a prestressed steel bar in the sectional suspended splicing construction stage of the steel box girder. The second girder ends are symmetrically hoisted and accurately positioned. According to the construction method, the finish-rolled deformed steel bars are adopted as prestressing force to conduct cantilever assembly construction on the open steel box girders, and the construction difficulty is small; the cantilever construction without traffic blocking is convenient; and the device has the advantages of saving construction temporary facilities and saving construction cost.

Description

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Claims

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Application Information

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Owner THE SECOND ENG CO LTD OF CHINA RAILWAYSEVENTH GRP PRC
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