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Self-compacting concrete topping pouring construction method for tubular column

A technology of self-compacting concrete and construction method, which is applied in the direction of columns, buildings, pillars, etc., can solve the problems of difficult discharge of air bubbles, reduction of cross-section, unfavorable force and force transmission of steel columns, etc., and achieve faster discharge speed and concrete The effect of strengthening strength and improving mechanical properties

Active Publication Date: 2022-05-13
CHINA CONSTR FIRST BUILDING GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to: in the super high-rise buildings existing in the prior art, in the steel pipe concrete pouring construction, due to the formation of a completely closed environment in the steel column, it is difficult to completely discharge the air bubbles generated inside the concrete, especially for steel pipes. For the area 2m to 3m below the inner partitions, air bubbles are very easy to gather here, forming cavities on the inner partitions, steel pipes and concrete surfaces, reducing the concrete cross-section in the CFST column, resulting in multiple discontinuities The short concrete-filled steel tube is not conducive to the overall stress and force transmission of the steel column, thus affecting the overall quality of the building. A construction method for self-compacting concrete roofing of round tube steel columns is provided.

Method used

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  • Self-compacting concrete topping pouring construction method for tubular column
  • Self-compacting concrete topping pouring construction method for tubular column
  • Self-compacting concrete topping pouring construction method for tubular column

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Embodiment 1

[0061] Such as Figure 1 to Figure 6 Shown:

[0062] A construction method for self-compacting concrete roofing of round pipe steel columns, comprising the following steps:

[0063] A. Make a steel pipe cylinder and install the steel pipe cylinder according to the design drawing: make a steel pipe cylinder that can discharge air bubbles generated inside the concrete, and install the steel pipe cylinder according to the design drawing to form a steel pipe round steel skeleton.

[0064] B. Configure self-compacting concrete: make a concrete mixture whose self-compacting performance meets the design requirements.

[0065] C. Concrete-filled steel pipe pouring: pour the self-compacting concrete prepared in step B into the steel pipe cylinder to form a steel pipe concrete structure.

[0066] Adopting a construction method for self-compacting concrete roofing of round pipe steel columns according to the present invention, by setting a steel pipe cylinder that can discharge air bub...

Embodiment 2

[0092] Such as Figure 1 to Figure 6 As shown in the present invention, a construction method for self-compacting concrete roofing of round pipe steel columns, in the step B, the mix ratio of self-compacting concrete should be based on the characteristics of the applied structure, construction technology and environmental factors Design the technical requirements of self-compacting concrete. On the basis of comprehensive consideration of concrete self-compacting performance, strength, durability and other necessary performance requirements, the initial mix ratio is proposed, and the benchmark that meets the workability requirements is obtained through laboratory trial adjustment. Mixing ratio, and further check the strength and durability to obtain the production mixing ratio.

[0093] As a preferred embodiment, on the basis of the above method, further, the self-compacting concrete mix design adopts the absolute volume method; the water-cement ratio of self-compacting concret...

Embodiment 3

[0121] Such as Figure 1 to Figure 6 As shown in the present invention, a construction method for self-compacting concrete roofing of round pipe steel columns, in the step C, the high-throwing method is used for pouring below the third floor of the building slab structure, and the third floor of the building slab The above is poured by jacking method.

[0122] The technical principle of high-throw concrete pouring is to adopt a reasonable mix ratio to make the concrete mixture have high fluidity, no segregation and no bleeding during high-altitude throwing, and use pouring without vibration or less vibration. During the process, the kinetic energy generated when throwing down from a high place meets the requirement of self-compacting. The high throw pouring method is mature, the construction is simple and fast, and the overall construction cost is low.

[0123] The jacking method is in the lower part of the steel column, the height is suitable for construction, and a hole sl...

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Abstract

The invention relates to the field of building construction, in particular to a self-compacting concrete topping construction method for a circular pipe steel column, which comprises the following steps: A, manufacturing a steel pipe cylinder and installing the manufactured steel pipe cylinder according to a design drawing; B, preparing self-compacting concrete; and C, pouring the steel pipe concrete. According to the self-compacting concrete topping construction method for the circular pipe steel column, the steel pipe cylinder capable of discharging the bubbles generated in the concrete is arranged, and the situation that when the concrete is poured, the bubbles generated in the concrete are accumulated in the steel pipe cylinder, and consequently the concrete in the steel pipe cylinder is hollow is avoided. Meanwhile, a corresponding pouring construction method is arranged to be matched with the steel pipe cylinder structure, hollowing of the concrete in the steel pipe cylinder is further avoided, and therefore the mechanical property of the steel pipe concrete structure is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for self-compacting concrete roofing of round pipe steel columns. Background technique [0002] The concrete filled steel pipe structure is a composite structure that fills the steel pipe with concrete and combines two materials with different properties into a whole. The strength and rigidity of the steel pipe are increased by pouring concrete into the steel pipe and compacting it. In the steel tube concrete structure, the steel tube and its internal concrete can bear the external load together. According to the different cross-sectional forms, it can be divided into circular steel tube concrete structure, square steel tube concrete structure, rectangular steel tube concrete structure and polygonal steel tube concrete structure. The concrete-filled steel tube structure has the advantages of high bearing capacity, good ductility, superior seismic perform...

Claims

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Application Information

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IPC IPC(8): E04C3/36E04G21/02E04G21/08
CPCE04C3/36E04G21/02E04G21/08Y02W30/91
Inventor 朱光强袁梦影袁内梦陈蓉曾林冯杉雷祥杨力彬祝运节张鹏
Owner CHINA CONSTR FIRST BUILDING GRP CORP LTD
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