Firstly, the sonic tube is the passage through which the probe enters the pile when the ultrasonic detection method is applied to the cast-in-place pile. It is an important part of ultrasonic testing system for cast-in-place piles, and its embedding mode and arrangement on pile section will directly affect the testing results. Therefore, when designing the pile to be tested, the layout and embedding method of acoustic pipes should be marked in the drawings, and the embedding quality should be strictly controlled in the construction to ensure the smooth test.

Second, the classification:

1, specifications of spiral thick-walled ultrasonic tubes: 50* 1.5, 50* 1.8, 50*2.0, 50*2.5, 50*2.75, 50*3.0 and 50*3.5.

2. Specifications of spiral thick-walled ultrasonic sounding tube: 54* 1.5, 54* 1.8, 54*2.0, 54*2.2, 54*2.5, 54*2.75, 54*3.0 and 54*3.5.

3. Specifications of spiral thick-walled ultrasonic sounding pipe: 57* 1.5, 57* 1.8, 57*2.0, 57*2.2, 57*2.75, 57*3.0 and 57*3.5.