Single-hole ultrasonic detection device and method for continuous integrity and rock penetration depth of concrete anti-seepage wall body

Abstract

The invention discloses a single-hole ultrasonic detection device and method for continuous integrity and rock penetration depth of a concrete diaphragm wall, the detection device comprises an equipment host, an ultrasonic transducer and an ultrasonic signal feedback device, the equipment host comprises an ultrasonic transmitting module and an ultrasonic signal acquisition module, the ultrasonic transmitting module is used for generating ultrasonic waves and transmitting the ultrasonic waves out through the ultrasonic transducer, and the ultrasonic transducer is used for collecting and recycling the reflected ultrasonic waves, converting the recycled ultrasonic wave information into electric signals and transmitting the electric signals back into the equipment host. And the signal feedback device analyzes and calculates acoustic resistance parameters of the target medium by judging the reflected ultrasonic waves, so that medium information encountered in the ultrasonic wave propagation process is judged. The device is different from traditional ultrasonic detection equipment, ultrasonic sound pressure value acquisition is adopted, and the judgment of medium information and the calculation of the rock entering depth of the diaphragm wall are realized through the acoustic impedance information relationship between the ultrasonic sound pressure value and the target medium.

Description

technical field [0001] The invention relates to the field of construction quality inspection of anti-seepage walls of water conservancy projects, in particular to a single-hole ultrasonic inspection device and method for the continuous integrity and depth of penetration of concrete anti-seepage walls. Background technique [0002] Concrete anti-seepage walls have been widely used in dam anti-seepage reinforcement projects due to their reliable anti-seepage performance, large water head, and strong adaptability to stratum conditions. In order to ensure the overall anti-seepage reinforcement effect, the engineering design has strict requirements on the continuous integrity of the wall and the depth of rock penetration. The anti-seepage wall is an underground concealed project. Due to the complex and changeable stratum conditions, defects such as wall faults, mud inclusion, excessively thick sediment at the bottom of the wall, and insufficient rock penetration depth are prone t...

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Problems solved by technology

The detection effect of this method on the continuous integrity depends on the rate of core sample collection. A high rate of sample collection means that more economic and time costs need to be invested, and the quality of the wall at the part where the core sample is missing cannot be reflected; For the inspection of rock depth, since the position of the boundary between soil and rock cannot be predicted, it is necessary to drill holes on the outside of the wall to detect the bedrock surface at the same time, and the inspection workload is doubled, which is time-consuming and laborious

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