A detection device and detection method for cracks in underwater concrete panels of rockfill dams
A technology for underwater concrete and concrete panels, which is used in measuring devices, processing response signals of detection, instruments, etc., can solve the problems of expensive equipment, low inspection feasibility, high requirements for equipment and personnel capabilities, etc., and achieve accurate crack detection. , the detection results are accurate, the effect of eliminating detection errors
Active Publication Date: 2022-04-29
HOHAI UNIV
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Problems solved by technology
Manual diving inspection can effectively identify the fine cracks on the panel, but manual inspection requires high equipment and personnel capabilities, human errors are difficult to avoid, and the depth of the staff is limited, and the feasibility of inspection in dangerous waters is low, especially for High dams make it difficult to inspect a full range of panels; underwater drone inspections require high equipment accuracy, but are still limited by complex working environment issues such as underwater clarity or underwater flow velocity, and cannot effectively identify panels cracked state, and the equipment cost is too expensive
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 , 2 As shown, the present invention provides a detection device for cracks in underwater concrete panels of rockfill dams, including a traction device 1 and an induction device 2, the traction device 1 and the induction device 2 are connected through a shock absorbing device 3, and the excitation device 4 is assembled At the lower part of the traction device 1 , the induction device 2 and the excitation device 4 are respectively fixed with a signal acquisition device 5 , and the signal acquisition device 5 is electrically connected with the signal processing device 6 .
[0025] The traction device 1 is a tractor, and the induction device 2 includes two rolling mechanisms connected to each other. The two rolling mechanisms are single-axle trailers with the same material and size and connected front and rear, that is, the front trailer ...
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The invention discloses a detection device and a detection method for cracks in the underwater concrete face of a rockfill dam. The detection device includes a traction device, an induction device that moves with the The excitation device that hits the concrete panel, the signal acquisition instrument for collecting the vibration signal is respectively installed on the induction device and the excitation device; also includes a signal processing device for receiving and processing the vibration signal collected by the signal acquisition instrument , the signal processing device identifies cracks according to vibration signals collected from the excitation device and the sensing device. By analyzing and processing the excitation signal and the response signal, the method constructs the damage diagnosis index based on the parameters of the ARX model, and gives the damage distribution of the concrete face, which can realize the detection of cracks and other damage in the underwater target area of the concrete face of the rockfill dam. It has the advantages of high efficiency and accuracy, high stability, strong controllability and low detection cost.
Description
technical field [0001] The invention relates to a detection device and a detection method for cracks in a face plate, in particular to a detection device and a detection method for cracks in an underwater concrete face of a rockfill dam. Background technique [0002] The concrete face rockfill dam is a kind of rockfill dam with rockfill material as the supporting structure, and the face plate is installed upstream as the anti-seepage structure. It has the characteristics of good adaptability and obvious economic benefits. With the improvement of the design level and the maturity of the dam construction method, concrete face rockfill dams with a height of 100 meters have appeared. However, the stress deformation, structural stability and face crack mechanism of high face dams are more complicated than those of traditional rockfill dams. The upper face face cracks in different degrees during the construction period and impoundment period, including structural cracks caused by ...
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IPC IPC(8): G01N29/04G01N29/44
CPCG01N29/045G01N29/4472G01N2291/0232
Inventor 郑东健武鑫马建业
Owner HOHAI UNIV