The Crosshole Sonic Logging (CSL) was originally developed by the French National Construction Industry Research Center (CEBTP) during the late 1960’s. The CSL method is a method to verify the structural integrity of drilled shafts and other concrete piles. it is considered to be more accurate than sonic echo testing in the determination of structural soundness of concrete within the drilled shaft inside of the rebar cage.

CSL tubes are usually attached to the reinforcement cage along the full length of the shafts. After concrete has been poured, the tubes are filled with water. In CSL, a transmitter emits an ultrasonic signal in one tube and the signal is sensed some time later by the receiver in another tube. Poor concrete between the tubes will delay or disrupt the signal. The engineer lowers the probes to the bottom of the shaft and moves the transmitter and receiver upward, until the entire shaft length is scanned. The engineer repeats the test for each pair of tubes. The engineer interprets data in the field and later reprocesses it in the office to check the structural integrity.

Our Sonic tubes are Push-fit type CSL tubes are made by thin black annealed steel tube, with an enlarge end in a bell mouth shape .Specially designed rubber gasket for the bell mouth ensure quick installation and perfect sealing to keep the tube integrity and avoid the entry of other material.

Advantages:

1.Fast and easy installation by worker.

2.Push-fit assembly.

3.No welding required at jobsite.

4.No equipment required.

5.Easy fixing to rebar cage.

6.Push-fit mark to ensure full engagement..

Crosshole Sonic Logging(CSL) Access Tubes/Sonic Tubes Used for Pile Foundation Inspection.

Size: 50-163mm Thickness: 1-1.5mm

Type: (Flaring or Grooved) Bell Mouth

Material: Q195 Elongation:≥14% Internal Pressure: ≥1Mpa External Pressure: ≥4Mpa