Acoustic detection pipes are generally installed in sections together with steel cages. The joints between each section can use reverse threaded casing joints or casing welding solutions. If plastic corrugated pipes are used, the casing joints can use longer For large corrugated pipes, both ends of the sleeve installation pipe joints can be wrapped and sealed with tape. Regardless of the connection scheme used, it must be ensured that the mud does not leak under high hydrostatic pressure. The inner wall of the joint should be kept flat and free of protrusions such as welding slag and installation burrs to avoid impeding the free installation and movement of the probe. The bottom of the acoustic tube should also be sealed. After installation, wooden plugs should be used to block the upper opening to prevent foreign objects from falling in and blocking the holes when pouring concrete. The sonic inclinometer tube is now an indispensable plastic acoustic test tube, which can be used to detect the quality of installed test piles. The ultrasonic plugging tube is the channel through which the probe enters the pile body during ultrasonic testing of cast-in-place piles.

Acoustic detection tube, also called sonic logging pipe, is a type of steel pipe that needs to be used by ultrasonic detection method in pile foundation detection. The sonic logging pipe can be used to form a channel inside the pile foundation, so that the detection instrument can enter the pile body during detection, thereby Check the condition of pile foundation.
1. When installing the sonic logging pipe, the lower end should be closed and the upper end should be capped. At the same time, ensure that the inside of the tube is unobstructed and there are no foreign objects in the tube.
2. The acoustic pipe should be tied to the inside of the steel cage, and welding is not allowed to be firmly connected to the steel cage (to prevent the acoustic pipe from entering into the acoustic pipe when pouring the pile foundation, causing the acoustic pipe to become clogged or damaged. tube deformation, etc.).
3. When connecting the sonic logging pipe to the acoustic detection tube, make sure the connection is firm and sealed. If necessary, a closed water test should be performed on the connection to check whether there is water leakage or slurry leakage, and to prevent joint breakage and pipe blockage. The connection should be smooth, without water or slurry leakage, and the sonic logging pipe should be prevented from deforming. If deformed, it should be replaced.
4. When the sonic logging pipe are pre-embedded, they should be tied firmly to avoid displacement of the acoustic pipes due to the gravity of the concrete and ensure that the acoustic pipes are parallel to each other after being piled.
5. The bottom of the sonic logging pipe should be flush with the bottom of the steel cage. The mouth of the sonic logging pipe should be more than 100mm higher than the top of the pile. The height of the mouth of each sonic logging pipe should be such that when pouring concrete, check whether the upper end of the acoustic pipe is at any time. The cover must be tight to prevent concrete from entering the sonic logging pipe and the ultrasonic probe cannot enter normally.
6. When breaking the pile head, the sonic tube should be protected, not only to prevent the sonic tube from being damaged, but also to prevent cement blocks, debris, etc. from entering the sonic tube and affecting the normal entry of the ultrasonic probe.
7. When the pile diameter is less than 2.5m, 3 sonic logging pipe are buried. The sonic logging pipe are distributed in an equitriangular shape, and the tubes should be parallel to each other. When the pile diameter is greater than 2.5m, 4 sonic logging pipe are buried. The tubes are distributed in a square shape, and the tubes should be parallel to each other.

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