Cone Penetration Test (CPT) machine on the crawler
The CPT test is performed using a cylindrical penetrometer with a conical tip (cone) penetrating the ground at a constant rate. During the penetration, the forces on the cone and the friction sleeve are measured. The measurements are carried out with analog read-out or using electronic transfer and data logging, with a measurement frequency that can secure detailed information about the soil conditions.
The available models are with 50, 100, 150 or 200 kN thrust. The maximum effective pushing capacity of the CPT penetrometer rig depends on the effectiveness of the anchoring the framework.
With semi or fully automatic anchorage system. The machine is a self-moving on the crawlers.
The results from a cone penetration test can in principle be used to evaluate:
- soil type
- soil density and in-situ stress conditions
- shear strength parameters
The static penetrometer can be also equipped with CPTU or SCPTU piezocone allowing to measure the insitu pore pressure and therefore it will be suitable for dissipation testing as well. All parameters are measured continuously.