Auto-Controlled Pressuremeters
Following in the footsteps of Louis Ménard, Apageo offers you a range of unique instruments: the Ménard Auto-Controlled Pressuremeters, controlled by GeoBOX®. These pressuremeters are the only devices on the market that allow pressuremeter tests to be carried out in a completely automatic and autonomous way, for each test (calibration, pressuremeter, purging, etc.) and for the entire procedure from pressurisation, unwinding/adjustment of the bearings, to deflation of the probe.
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Discover our line of self-monitoring pressure gauges, controlled by GeoBOX®
THE BENEFITS
- Conducting pressuremeter tests easily, as the process is fully self-monitored. Control and data acquisition via the GeoBOX® central processing unit (which is also suitable for acquiring other geotechnical data).
- Fully automated control from the expansion process through to deflation of the probe, for each test (calibration, pressure measurement, purging, etc.)
- Automated adjustment of pressure levels with unmatched precision based on resistance to ensure a perfect test! Perfect control of regulation and differential pressure Time savings on site and, therefore, improved productivity (the operator can prepare for the next steps while the test runs automatically)
- Reliability of results and elimination of the risk of errors in implementation and/or data collection and/or subsequent data entry into the computer system. Very low nitrogen consumption (GeoPAC®).
GeoPAC® Compact
This pressuremeter equipment manages the testing process fully automatically and autonomously, based on the operator’s decision. GeoPAC® simplifies the testing process, enhances the reliability of results, and reduces setup time. GeoPAC® Compact, the latest addition to the line, features a new design with reduced dimensions and weight while maintaining the same performance.
Implementation
A pressuremeter test must be performed beforehand: undisturbed soil walls, a diameter matching that of the probe (63 mm or 76 mm), and the surrounding soil disturbed as little as possible.
Once the probe is positioned at the desired level, the operator uses the GeoBOX® to initiate the test. From that point on, the test proceeds entirely autonomously throughout its duration (varying pressure levels, managing differential pressure, deflation, etc.), and the operator can monitor the progress on the screen, view the curve, and intervene during the test if desired.
Applications
Standard static loading tests of a soil in place by means of a radially expandable cylindrical probe inserted into a borehole
Fully parameterisable cyclic tests
Controlled volume tests
Sinusoidal mode tests
HyperPAC® (High Pressure)
It enables very high-pressure pressuremeter tests to be conducted on very hard rocks and soils.
The ingenuity of the system lies in a single water circuit, mechanically pressurized to perform pressuremeter tests with impeccable reproducibility. Special probes have been developed to withstand very high pressures.
Implementation
A hole must be drilled beforehand by core drilling or roto-percussive methods, with a diameter adapted to that of the single-cell probe (47 or 48 mm).
Once the probe is positioned at the desired level, the operator, via GeoBOX® , orders the execution of the test. From then on, the test is carried out completely autonomously, just like GeoPAC®.
Applications
Standard static loading tests in very hard soils (above 10 MPa) and soft to very hard rocks with a single cell probe
Fully configurable cyclic tests
As with a GeoSPAD2® manual pressuremeter, the tests made with GeoPAC® or HyperPAC® are saved on the GeoBOX® (without time limit) and then transferred by GPRS (option) or USB key and processed on the GeoVISION® software.
