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Customized retractable bridge expansion joint formwork and construction method

A technology of expansion joints and templates, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as rough surface of box girder end, narrowing of expansion joint width, inability to hook out completely, etc., to improve quality control, expansion and contraction The joint size is flat and the effect of reducing the construction cost

Active Publication Date: 2021-07-27
CHINA NUCLEAR IND 22ND CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When removing the formwork, the foam board is manually hooked out with a hook, and then the formwork is pulled out. This method is easy to obtain and cheap, but the hardness of the foam board is low, and it is easy to squeeze and deform when pouring box girder concrete, causing the width of the expansion joint to narrow; It is not easy to construct during demolition, and cannot be completely hooked out, and the surface of the end of the box girder formed after demolition is not smooth

Method used

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  • Customized retractable bridge expansion joint formwork and construction method
  • Customized retractable bridge expansion joint formwork and construction method
  • Customized retractable bridge expansion joint formwork and construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] see Figure 1-3 , a custom-made openable bridge expansion joint formwork, which includes a terminal formwork 1, and multiple groups of opening and closing support mechanisms 5 capable of opening and closing are installed on the back of the end formwork 1; the opening and closing support mechanisms 5 are deployed When it is used to support the end formwork 1, it will loosen the end formwork 1 when it is turned and closed. This formwork can customize the formwork of the corresponding size according to the needs of the on-site box girder end formwork support, which improves work efficiency and reduces construction costs. After the expansion joints are poured, they can be easily disassembled, effectively improving work efficiency. Reduced construction costs.

[0038] Further, the size of the end template 1 is determined according to the section size of the box girder, and is formed by cutting and splicing a plurality of templates. The above-mentioned structure can actuall...

Embodiment 2

[0044] see Figure 4-8 A method for constructing expansion joints by using any one of the custom-made openable bridge expansion joint templates, comprising the following steps:

[0045] Step 1: Familiarize yourself with the section size of the box girder according to the drawings, determine the splicing position of the end formwork 1, divide and number the customized openable bridge expansion joint formwork unit blocks, cut the formwork manually, and mark the cut formwork for convenience assembled;

[0046] Step 2: Manually polish the template cutout to ensure it is flat and smooth, and then assemble the single templates according to the numbers to finally form the whole end template 1;

[0047] Step 3: Use the hinge 3 to connect the end formwork 1 and the supporting vertical rib 4, and the sum of the width of the end formwork 1 and the supporting vertical rib 4 is the width of the expansion joint;

[0048] Step 4: Clean up the surface of the custom-made openable bridge expa...

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Abstract

The invention provides a customized retractable bridge expansion joint formwork and a construction method. The customized retractable bridge expansion joint formwork comprises an end formwork, and a plurality of retractable supporting mechanisms capable of being opened and closed are installed on the back face of the end formwork; and the retractable supporting mechanism is used for supporting the end formwork when unfolded, and the end formwork is loosened when the opening and closing supporting mechanism is rotated and folded. According to the formwork, the formwork of the corresponding size can be customized according to the requirement for erecting a box girder end formwork on site, after an expansion joint is poured, the formwork can be conveniently detached, the working efficiency is effectively improved, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a custom-made openable and closable bridge expansion joint formwork and a construction method. Background technique [0002] At present, in the domestic construction process of the expansion joints of cast-in-place box girders, the support space for the formwork at both ends of the box girder is narrow. Taking a municipal bridge project as an example, the width of the expansion joints of the bridge is 80mm, and the conventional formwork installation method is After the formwork, foam boards are filled at the expansion joints to achieve the purpose of controlling the width of the expansion joints and ensuring the end quality of the cast-in-place box girder. When removing the formwork, the foam board is manually hooked out with a hook, and then the formwork is pulled out. This method is easy to obtain and cheap, but the hardness of the foam board is low, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/06E01D21/00E01D2/04
CPCE01D19/06E01D21/00E01D2/04
Inventor 刘宁陈双庆彭小松付人杰洪春张涛
Owner CHINA NUCLEAR IND 22ND CONSTR