CPT Test
CPT static penetrometric testing (mechanical type) essentially consists of measuring the resistance to insertion of a mechanical bit of standardised dimensions and characteristics, as it is driven into the ground at a constant speed (2 cm/sec).
In tests with the Begemann mechanical bit, the values Qc (bit resistance), Fs (side friction) and Qt (total resistance) are measured via a load cell and shown on the display of the electronic acquisition board.
Selector
In order to control the movement of the Begemann bit, the driving rods, which act on the various components of the bit, are telescopic. An enlargement ring can be installed on the external set of rods to decrease the friction on the rods, facilitating their insertion.
The load cell, which measures the driving insertion force, is installed inside a removable unit called the “selector“, which presses alternately on the inner and outer rod.
Two types of selector exist:
● Manual selector
Before starting a driving stage, the operator must manually operate a lever which prepares the selector for the command of the inner or outer rod.
● Hydraulic selector
During the driving stage the rods are operated automatically by a hydraulic command. The operator must simply control the driving movements for insertion of the rods.
Pagani Geotechnical Equipment supplies the accessories (Begemann bits, rods, load cells) necessary for performing CPT tests.
Selector with load cell
Compatible Penetrometers
Version:
Static
Engine:
Petrol 16.9 kW
Diesel 13.2 kW
Maximum Thrust Capacity:
150 kN
33721 pounds
Maximum Extraction Capacity:
160 kN
35969 pounds
Anchoring System:
Modular Anchoring
Pagani TG63-150 (Static/Dynamic)
Version:
Static/Dynamic
Engine:
Petrol 16.9 kW
Diesel 13.2 kW
Maximum Thrust Capacity:
150 kN
33721 pounds
Maximum Extraction Capacity:
160 kN
35969 pounds
Anchoring System:
Modular Anchoring
Pagani TG73-200
(Static/Dynamic)
Versions:
Static
Static/Dynamic
Engine:
Diesel 22.4 kW
Maximum Thrust Capacity:
200 kN
44961 pounds
Maximum Extraction Capacity:
250 kN
56202 pounds
Anchoring System:
Telescopic Anchoring