PVC DURVINIL® sonic log casings are the cost effective solution for integrity checking of concrete piles and deep foundationus. The casings are used to execute sonic probes. They tied to the structure’s reinforcement by means of wire or plastic strips and, once the reinforcement is dropped and the concrete cast is in place, the casings can be used carry out sonic trials.

Crosshole Sonic Logging (CSL) is a method to determine the structural integrity and homogeneity of concrete within diaphragm walls, bored piles, drilled shafts, barretes, concrete piles or augercast piles by checking the porosity, the void distribution and the quality of cementation of concrete structures. Sonic logging is the continuous measurement of sound velocity between an emitting device and a receiving sensor (microphone), which are lowered down inside the casings. If the soil is homogeneous and cementation was carried out successfully, sound velocity is constant, whereas it decreases rapidly if there are defects such as soil inclusions, cracks or voids.

PVC DURVINIL® sonic log casings are manufactured in different diameters and lengths and suitably joined, they can reach the required depth.

Compared to metal sonic casings, they are lighter, easier to install and cheaper.


CFA Poles/Diaphragms

Diaphragm walls




Recycled materials

Easy to install and transport


Code Sonic Log
Ø Internal
Ø External
Collapse Pressure
Socket [mm]
105000086 1"1/2 Standard


48 830 30 55
105000069 1"1/2 Rinforzato


50 1020 50 55
105000068 2" 50 60 1250 30 69
105000100 2"1/2 64 75 1800 20 85
105000102 3" 71?? 88.5 1810 10 98
105000116 4" 102 114 3050 10 125

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