Overview
The document provides a detailed description of the Ménard Pressuremeter and its testing procedures according to EN ISO 22476-4 and ASTM D-4719-00 standards. It outlines the equipment used, the test procedure, and the data acquisition system.

Test Description
The Pressuremeter test is an in-situ stress-controlled loading test performed on the wall of a borehole using a cylindrical probe that expands radially. The test results in a stress-strain curve, providing the Ménard Pressuremeter modulus, creep pressure, and Menard limit pressure.

Equipment

• Control Unit: Regulates pressure applied to the probe and reads volume changes. It includes a nitrogen cylinder, volumeter, pressure regulators, and gauges.
• Plastic Tubing: Connects the probe to the monitoring box, designed for high resistance and minimal dilation.
• 3-cell Probe: Contains a central measuring cell filled with water, protected by a rubber cover, and balanced through a differential pressure regulator.

Test Procedure
The borehole is drilled to minimize wall disturbance. The probe is lowered to the test depth, and pressure is applied incrementally. Readings are taken on the Control Unit. In challenging conditions, a slotted tube may be used to insert the probe.

Data Acquisition System - GEOSPAD®
GEOSPAD® is a computerized system for automatic data logging of Pressuremeter tests. It features a touch screen, thermal printer, and memory card recorder. It ensures accurate readings and conforms to NF P 94-110-1 and ASTM D-4719-87 standards. The system allows for automatic test execution and data transfer for processing with GeoVision® software.

Technical Specifications

• Control Unit: Dimensions 86 x 43 x 26 cm, mass 24.5 kg, includes a tripod and level for vertical adjustment.
• GEOSPAD®: Compact, waterproof, dimensions 33 x 27 x 20 cm, weight 4 kg, operates in temperatures from -20 to +70 °C, and supports multiple languages.

Test Treatment
Data from tests can be processed using GeoVision® software, allowing for detailed analysis and reporting.