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Cast-in-place concrete hollow slab girder and mandrel support construction method thereof

A hollow slab beam and construction method technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of uneven thickness of hollow slabs and lack of thickness of roof parts, so as to avoid the demoulding process, save labor costs, and easily The effect of promotion

Pending Publication Date: 2018-02-09
北京清河水利建设集团有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a construction method for supporting the cast-in-place concrete hollow slab beam mandrel to solve the problems of uneven thickness of the hollow slab and lack of thickness of the top slab caused by the floating of the mandrel

Method used

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  • Cast-in-place concrete hollow slab girder and mandrel support construction method thereof
  • Cast-in-place concrete hollow slab girder and mandrel support construction method thereof
  • Cast-in-place concrete hollow slab girder and mandrel support construction method thereof

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Embodiment Construction

[0042] The invention provides a construction method for supporting cast-in-place concrete hollow slab beam mandrel, the process flow chart of which is as follows figure 1 shown, including:

[0043] (1) Bottom positioning reinforcement binding:

[0044] Such as figure 2 As shown, several horizontal bottom positioning reinforcement bars 2 are tied at a predetermined distance above the bottom surface of the reinforcement cage 1. In this embodiment, the bottom positioning reinforcement bars 2 are arranged in parallel and at intervals, preferably using smooth round reinforcement bars with a diameter of 10mm. Bind and connect with the main reinforcement 11 of the reinforcement cage 1;

[0045] (2) PE pipe laying:

[0046] Such as figure 2 As shown, the PE pipe 3 is horizontally penetrated into the reinforcement cage 1 and placed above the bottom positioning reinforcement 2;

[0047] (3) Stirrup positioning and binding:

[0048] Such as figure 2 As shown, the PE pipe 3 is f...

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Abstract

The invention provides a cast-in-place concrete hollow slab girder and a mandrel support construction method thereof. The mandrel support construction method comprises the following steps that A, a hard core pipe is fixed to the interior of a steel reinforcement cage; B, the end of the core pipe is sealed; and C, concrete is poured in the steel reinforcement cage, and the hollow slab girder is formed. In the pouring process, firstly a first layer of concrete is formed at the pipe bottom at a low speed, then a second layer of concrete is formed on a pipe body at a lower speed, and finally a third layer of concrete is formed at the pipe top at a high speed. By adopting the construction method, after concrete pouring is completed, the situations that the hollow slab thickness is not even, andlacking of the partial thickness of a top plate is caused cannot occur.

Description

technical field [0001] The invention relates to a construction method for supporting a mandrel form of cast-in-situ concrete hollow slab beams. Background technique [0002] Concrete hollow slab bridges play an important role in bridge construction in my country. At present, for permanent bridges with small and medium spans, whether they are highway bridges or urban bridges, concrete hollow slab bridges are used as much as possible, because such bridges have in-situ Material selection, industrial construction, good durability, strong adaptability, good integrity and many other advantages. Using the bridge hollow plate inflatable mandrel hole forming process, the construction is convenient, the application range is wide, and it can be used repeatedly for more than 80-100 times. It is actually the first choice for reducing costs and improving construction progress. It not only saves materials, but also has the characteristics of changeable shape, which can be formed into circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/00E01D19/12
CPCE01D2/00E01D19/12
Inventor 袁伟宏张建王月明李杨赵志峰颜硕李响曹春艳李金涛袁汉章董杰李鹏孙京
Owner 北京清河水利建设集团有限公司
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