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Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof

A technology of concrete and rounded corners, which is applied in the fields of formwork/formwork/work frame, on-site preparation of building components, hydraulic engineering, etc. , the construction is convenient, the effect of reducing the workload

Active Publication Date: 2009-10-07
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the flow channel adopts a gradual rounded shape, if the conventional inverted "T" beam prefabricated formwork is used for construction, the concrete at the rounded corner will have sharp corners, such as image 3 As shown, at the same time, a narrow closed space is formed in the rounded part of the vertical formwork, and the concrete is difficult to be poured densely, which cannot meet the shape requirements of the runner.

Method used

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  • Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof
  • Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof
  • Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof

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Embodiment Construction

[0023] Such as Figure 4 , Figure 5 , Figure 6 As shown, in this embodiment, the prefabricated formwork 104 constructed on the top plate of the gradual fillet section of the concrete flow channel is in an inverted "T" shape. At the end corresponding to the gradual fillet of the flow channel, the lower flange 104-1 of the prefabricated formwork is removed. Leave the rectangular section 104-2.

[0024] The longitudinal length of the rectangular section 104-2 at the end of the prefabricated template 104, that is, the length of the removed lower flange is uniformly slightly greater than the maximum fillet radius (ie figure 2 Gradient fillet section marked as 14) is determined. And the steel plate 104-3 is pre-embedded at the bottom of the two ends of the prefabricated formwork 104, and the steel bar 104-4 at one end of the lower flange is removed and protrudes from the lower flange to an appropriate length horizontally, see Figure 7 .

[0025] In this embodiment, the cons...

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Abstract

The invention discloses a prefabricated formwork of a concrete flow passage gradation rounded corner section top plate construction and construction craft, which is characterized by the following: non-changing body and size of gradation rounded corner section concrete flow passage; connecting the gradation round and straight line edge flat sequence; arranging reinforced bar on the range of the rounded corner gradation; meeting demand of force and structure; keeping contact of each section of the top plate; displaying the prefabricated formwork as reverse 'T' shape; defaulting lower flange of the prefabricated formwork; retaining rectangular section. This invention can be used to cast diffused section top plate concrete of land surface workshop tail pipe of hydraulic power station.

Description

technical field [0001] The invention relates to a prefabricated formwork used for the construction of the top plate of the gradual fillet section of the concrete flow channel and its construction technology. It is suitable for pouring concrete on the top plate of the draft tube diffusion section of the ground powerhouse of the hydropower station. Background technique [0002] In some hydropower stations, the space height and span of the concrete flow channel are relatively large, and the roof concrete is poured using the conventional load-bearing formwork construction method. The load-bearing formwork needs to use a large number of vertical support structures. The formwork can only be removed after the concrete reaches the design strength, and the formwork turnover period is long. In response to this situation, the roof concrete of the diffuser section of the draft pipe of some built ground powerhouses of hydropower stations is poured using the inverted "T" beam prefabricat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/02E04G13/00
CPCY02E10/22Y02E10/20
Inventor 江亚丽郑芝芬徐跃明
Owner POWERCHINA HUADONG ENG COPORATION LTD