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Test method and system for grouting compactness of pre-stressed duct of bridge

A technology of hole grouting and prestressing, which is applied in the direction of analyzing solids using sound waves/ultrasonic waves/infrasonic waves, which can solve problems such as low efficiency, high cost, and poor precision, and achieve high efficiency, low cost, and high precision.

Inactive Publication Date: 2012-12-12
杭州海儿科技有限公司 +1
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  • Abstract
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Problems solved by technology

[0006] The embodiment of the present invention provides a method and system for detecting the density of bridge prestressed channel grouting, which is used to solve the problems of poor precision, low efficiency and high cost in the detection method in the prior art

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  • Test method and system for grouting compactness of pre-stressed duct of bridge
  • Test method and system for grouting compactness of pre-stressed duct of bridge
  • Test method and system for grouting compactness of pre-stressed duct of bridge

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Embodiment Construction

[0041] Due to the existing detection methods, there are many problems. The technical problem to be solved by the present invention is the problem of insufficient compaction of post-tensioned prestressed grout in bridge construction. This problem has been widely concerned. In order to overcome this difficulty, it is necessary to use non-destructive testing technology to test the overall grouting quality of the tunnel of the prestressed structure.

[0042] The principle of the embodiment of the present invention is based on shocking and exciting the concrete at the test site and inducing free vibration, and by testing its reflection characteristics, the propagation velocity of the elastic wave in it is converted. According to the size of the speed, so as to determine the density of grouting.

[0043] The main realization principles, specific implementation modes and corresponding beneficial effects that can be achieved of the technical solutions of the embodiments of the present...

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Abstract

The invention discloses a test method and a system for grouting compactness of a pre-stressed duct of a bridge. The test method includes determining the center line position of the pre-stressed duct to be tested and fixing an acceleration transducer at the center line position; performing knocking and excitation around the acceleration transducer through an excitation hammer, and collecting elastic wave data produced by excitation through the acceleration transducer; and calculating the equivalent reflection wave velocity according to the elastic wave data and determining the grouting compactness of the pre-stressed duct of the bridge according to the equivalent reflection wave velocity. According to an embodiment of the test method and the system, the non-destructive testing technology is adopted to detect the whole grouting quality of the duct with a pre-stressed structure; and the test method and the system have the advantages of high accuracy and efficiency and low cost, have great significance for objective evaluation of quality conditions of the pre-stress structure, and are suitable for being widely applied to engineering.

Description

technical field [0001] The invention relates to the technical field of road and bridge engineering quality and safety detection, in particular to a method and system for testing the density of grouting in prestressed tunnels of bridges. Background technique [0002] With the development of highway and bridge construction in our country, prestressed concrete bridges have taken the dominant position in bridge construction in our country and are widely used in many important bridge construction projects. In order to ensure that the prestressed steel strands play a long-term role in the use of the bridge and meet the design requirements, the grouting quality of the prestressed tunnel is an important factor that must be guaranteed. If the grouting in the prestressed channel is not dense, the metal material will corrode quickly under the high stress state, and the steel strand material in the channel is prone to corrosion, thus affecting the durability and safety of the bridge. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07
Inventor 吴佳晔杨超季文洪毛云龙侯建青朱哲吴曾炜黄伯太
Owner 杭州海儿科技有限公司
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