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Vacuum-assisted grouting device and method for gamma-type prestressed pipes

A pre-stressed pipeline, vacuum-assisted technology, applied in construction, building structure, construction material processing and other directions, can solve the problems of labor and time-consuming, and achieve the effect of strong controllability, reducing process and shortening construction period.

Active Publication Date: 2015-05-13
CHINA NUCLEAR IND HUAXING CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the compactness of the grouting and avoid air bubbles and voids, the secondary grouting method has been used for a long time, that is, the first time the retarded grout is poured, and the grout is blown after completion. Each time the grout is blown at least 2 to 3 times. 4 to 7 days after the grouting is completed, the second grouting is performed, which is labor-intensive and time-consuming

Method used

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  • Vacuum-assisted grouting device and method for gamma-type prestressed pipes

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Experimental program
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Embodiment 1

[0021] The gamma-shaped prestressed pipeline thixotropic slurry vacuum-assisted grouting device of this embodiment is as follows: figure 1 As shown, it includes the grouting caps A and B placed at both ends of the gamma-shaped prestressed pipeline 1 to communicate with the grouting pump and the gamma-shaped prestressed pipeline, and also includes the junction of the vertical section and the arc section of the gamma-shaped prestressed pipeline , the vacuum pipeline 2 led by the tee E2, and the valve control tee interface E3 set on the arc section higher than the joint and the valve control tee interface E4 set on the highest point of the arc section. The distance from the tee E2 to the tee interface E3 is 8-10 meters. The vacuum pipeline 2 has a sampling branch pipeline 3 controlled by a valve V2, and the transparent tube 4 passing through the valve V1 is connected to a vacuum pump through a sedimentation separator. The outlet sections of the main passages of the grouting caps...

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Abstract

The invention relates to a vacuum-assisted grouting device for gamma-type prestressed pipes and a vacuum-assisted grouting method for gamma-type prestressed pipes, and belongs to the technical field of building engineering. The device comprises group caps, a vacuum line, and at least one valve control three-way connector. The grout caps for communicating grout pumps with a gamma-type prestressed pipe are disposed at two ends of the gamma-type prestressed pipe. The vacuum line is led out of a vertical segment and arc segment joint of the gamma-type prestressed pipe. The valve control three-way connector is disposed on an arc segment higher than the joint. The vacuum line is connected with a vacuum pump through a sedimentation separator. The vacuum-assisted grouting device and method for gamma-type prestressed pipes has the advantages that high-quality grouting is guaranteed, construction period is shortened evidently, construction cost is saved and operation is facilitated.

Description

technical field [0001] The invention relates to a grouting device, in particular to a gamma-shaped prestressed pipeline vacuum-assisted grouting device, and also relates to a corresponding grouting method, which belongs to the technical field of construction engineering. Background technique [0002] The thixotropic slurry needs to be poured into the gamma steel bundle pipe in the 55C15 prestressed system of the containment in the civil engineering of the nuclear island of the EPR nuclear power plant. Because the vertical pipe is long, the transverse bending undulation is large, and the number of steel strands passing through it is large, Therefore, it is quite difficult to ensure that the grouting is dense, and air bubbles and voids are prone to appear. In order to ensure the compactness of the grouting and avoid air bubbles and voids, the secondary grouting method has been used for a long time, that is, the first time the retarded grout is poured, and the grout is blown af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/02E04G21/12
Inventor 廖春生孙帅黄权郝发领周博
Owner CHINA NUCLEAR IND HUAXING CONSTR