CPT TEST
In Cone Penetration Testing, with the Begemann Mechanical Cone, the Qc (tip resistance) and RL (side friction) values are measured with a load cell and displayed on a readout electronic unit.
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Available penetrometers for CPT tests |
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CPT Test |
Penetrometers |
Selector |
Acquisition System |
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Manual |
Hydraulic |
Manual |
Automatic |
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100 kN |
TG 63-100 |
R |
S |
R |
¨ |
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150 kN |
TG 63-150 |
R |
S |
R |
¨ |
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200 kN |
TG 73-200 |
S |
R |
R |
¨ |
| R = standard; ¨ = optional; S = not possible | |||||
To obtain the Begemann probe movements the rods consist of an inner and an outer rod that act on the different elements of the probe.
The load cell is located in a removable unit, called "selector", that manages the Begemann probe movements by pushing the inner and outer rods alternately .
There are two different kinds of selectors:
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Manual selector |
Hydraulic selector |
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The
operator must, before starting the pushing, operate on a lever that
arranges the selector to push on the inner or on the outer rod.
During
the pushing the rods are managed automatically by means of a hydraulic
device. The operator must control only the pushing movement.Acquisition Systems
Data measured by the load cell are acquired by means of an electronic device fixed to the selector and called "Acquisition system".
There are two kinds of Acquisition systems:
| Manual Acquisition System | Automatic Acquisition System |
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Data acquired from the load cell are monitored on the display of the STR002 device
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Data acquired from the load cell are monitored on the display of the ACQ002 device. By means of TGAS01 software it is possible, during the acquisition, to transfer the data to a PC. It is also possible to store off line up to 8 tests in the device memory and subsequently transfer them to a PC using the TGAS01 software. |
Anchoring
Our Penetrometers are equipped with an AUTOMATIC SELF-ANCHORING-SYSTEM that solves the problems often limit the diffusion of Static Penetrometer techniques, considered as one of the most valid In Situ Testings for a correct identification of Soil Mechanics Characteristics
The pushing force can be developed only if there is an equal counteracting force.
Pagani Geotechnical Equipment Penetrometers counteract the pushing force by means of a built-in system that allows a self-anchoring.
