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Vacuum grouting device and grouting method for prestress long distance, large diameter and multiple curvature duct

A long-distance, large-diameter technology, applied in construction, building construction, and building material processing, can solve the problems of long-distance, large-diameter, multi-curvature tunnel grouting, dense tunnel filling, and large voids, etc., to achieve Prevent the external harmful medium from invading the channel, the cross-section is completely dense, and the effect of improving the compactness

Pending Publication Date: 2020-11-27
CHINA CONSTR SECOND ENG BUREAU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For long-distance, large-diameter and multi-curvature channels, the existing grouting method cannot make the channels densely filled, and it is easy to form large cavities, which become channels for harmful media to invade the steel strand.
As far as the applicant knows, there is no grouting method suitable for long-distance, large-diameter, and multi-curvature tunnels

Method used

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  • Vacuum grouting device and grouting method for prestress long distance, large diameter and multiple curvature duct
  • Vacuum grouting device and grouting method for prestress long distance, large diameter and multiple curvature duct
  • Vacuum grouting device and grouting method for prestress long distance, large diameter and multiple curvature duct

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Embodiment Construction

[0034] Such as Figure 1 ~ Figure 3 shown. The prestressed long-distance large-diameter multi-curvature hole vacuum grouting device of the present invention comprises a grout inlet buffer 11, a grout outlet buffer 12, a grouting pump 13 and a vacuum pump 14, and the grout inlet buffer 11 is connected to the grouting pump 14 and the Between the entrances A of the grouting tunnel, the grout outlet buffer 12 is connected between the outlet B of the tunnel to be grouted and the vacuum pump 14 .

[0035] The slurry inlet buffer 11 is made of steel pipe, the upper and lower ends are sealed, the top side inlet 21 and the bottom side outlet 22 are welded by steel pipes, and a ball valve is installed at the top side inlet 21.

[0036] The slurry outlet buffer 12 is made of steel pipe, the upper and lower ends are sealed, the bottom side inlet 31, the top side outlet 32, the bottom sampling port 33 and the top exhaust port 34 are welded by steel pipes, and the top side outlet 32. The ...

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Abstract

The invention discloses a vacuum grouting device and a grouting method for a prestress long distance, large diameter and multiple curvature duct. The grouting device comprises a grouting pump and a vacuum pump. The grouting device is characterized by further comprising a slurry inlet buffer and a slurry outlet buffer. The slurry inlet buffer is arranged between the grouting pump and an entrance ofa to-be-poured duct, and the slurry outlet buffer is arranged between an outlet of the to-be-poured duct and the vacuum pump. According to the vacuum grouting device and the grouting method, as the vacuum pump works continuously in a grouting process, the slurry inlet buffer separates air in a grouting rubber tube initially, the slurry outlet buffer prolongs a vacuumizing time and the duct is kept in a vacuum state or an approximately vacuum state all the time, the duct is filled with the slurry. The vacuum grouting device is easy to operate and solves the problem of tedious steps as different grouting process methods are needed in different slurry types.

Description

technical field [0001] The invention relates to a nuclear power plant containment prestressed long-distance large-diameter multi-curvature tunnel grouting device, which belongs to the technical field of construction engineering, and more specifically, belongs to the prestressed construction technology. Background technique [0002] At present, in buildings with post-tensioned bonded prestressed systems such as containment shells of nuclear power plants, retarded cement slurry or expansive cement slurry is usually used to fill the tunnels to prevent harmful media from invading the tunnels and causing steel strands to rust. According to the applicant's knowledge, most of the holes reserved in the post-tensioning system are less than 150mm in diameter at present, and the existing grouting method can basically guarantee the compactness. With the replacement of nuclear power plants, the requirements for the prestressed tension of the containment are also increasing for the sake o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02E04G21/12
CPCE04G21/02E04G21/12
Inventor 付凯明王辉诚刘康刘军王勇李光远闫敏
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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