In order to understand the solidity and quality of cement concrete and pipe wall grouted by seamless concrete filled steel tubular pump, the construction quality of concrete filled steel tubular is nondestructively tested and appraised by ultrasonic pulse method.


Ultrasound detection of seamless steel pipe in concrete work, along the seamless steel pipe transmission, ultrasonic signal detection whether there is collision problem, and whether the ultrasonic pulse is reinforced concrete quality detection is the key. As long as the steel bar inside the concrete is dense and the concrete with pipe wall is good, wear detection is carried out in use. The first wave of ultrasonic longitudinal wave concrete receiving signal transmits radially along the pipeline, and the longer the time around the pipe wall is, the first wave of fracture after wave superposition. Therefore, the ultrasonic detection quality of reinforced concrete is feasible and effective.


The ultrasonic acoustic path depends on the diameter of the inner detector, the seamless steel tube and the two-layer steel plate are closely contacted with the sensor through the ultrasonic wall. The thickness of the steel tube is much smaller than that of the diameter seamless steel tube. Although the total amount of steel is faster than the sound velocity of the concrete, the impact detection when affecting the sound is the same as that when the reinforced concrete channel is perpendicular to the row bar. Generally negligible. In order to facilitate calculation, it is hoped that this method can be used as a practical distance for ultrasonic detection of pipeline diameter propagation.