Rock-fill dam underwater concrete panel crack detection device and method
A technology for underwater concrete and concrete panels, which is applied to measuring devices, processing response signals of detection, and analyzing solids using sonic/ultrasonic/infrasonic waves, etc. Advanced problems, to achieve the effect of accurate crack detection, elimination of detection errors, and accurate detection results
Active Publication Date: 2021-08-13
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 rock-fill dam underwater concrete panel crack detection device and method. The device comprises a traction device, an induction device which moves along with the traction device and is in contact with a concrete panel, and an excitation device which is fixed on the traction device and is used for vibrating the concrete panel. The induction device and the excitation device are respectively provided with a signal acquisition instrument used for acquiring the vibration signals. A signal processing device is included and is used for receiving and processing the vibration signals acquired by the signal acquisition instrument, and the signal processing device identifies the crack condition according to the vibration signals acquired by the excitation device and the induction device. According to the method, damage diagnosis indexes based on ARX model parameters are constructed by analyzing and processing excitation signals and response signals, the damage distribution condition of the concrete panel is given, detection of damage such as cracks in an underwater target area of the concrete panel of the rock-fill dam can be achieved, and the method is efficient, accurate, high in stability, high in controllability and low in 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