Geonor - Model H-70 -Field Inspection Vane Tester
The field vane shear test (FVST) is the most widely used method for measuring the undrained shear strength of soft clays in situ. A preliminary test with an inspection vane is economical, relevant, and provides quick, repeatable data for planning more detailed surveys. However, to obtain reliable results, your equipment must meet three requirements: 1. Avoid Soil Disturbance: The tester must allow direct penetration from ground level to avoid disturbances from boreholes. 2. Account for Friction: To prevent costly overestimations, the equipment must account for rod-soil friction, which is common below 3 meters. 3. Be Durable: The vane must be reliable even under the challenging conditions of deep operation.
- Field Investigation: Preliminary analysis of undrained shear strength in soft to medium stiff clays.
- Accurate Friction Evaluation: Unique 180-degree slip-coupling system provides a better evaluation of rod-soil friction.
- Deep Penetration: Reach 10 meters by direct penetration using hammering, drilling, or pressing, with no pre-boring required.
- Flexible Measurement: Two vane sizes with measurement ranges of 0 to 80 kPa and 0 to 160 kPa.
- Professional & Portable: Lightweight for one-person operation, with a durable, highquality stainless steel vane.
H-70: The Professional, low-Cost Solution
The Geonor H-70 was originally developed in Norway specifically for preliminary investigations in soft clays without pre-boring. It is a comparatively low-cost, yet entirely professional instrument designed to meet all three requirements.
Its most critical feature is the unique 180-degree «anti-friction» slipcoupling system. This system enables the operator to consistently determine the actual friction between the rods and the soil, thereby eliminating the primary source of costly overestimations.
Combined with its 10-meter depth capability and durable stainless steel construction, the H-70 is the ideal, portable tool for accurate, professional, and cost-effective field inspections.
Geonor H-70 Field Inspection Vane Tester
- Installation: sledge hammer, portable rock drill or pressed down
- Instrument accuracy: +/- 3% of full range
- Two sizes of vanes: range of measurement from 0 to 80 kPa (0-8 T/m2) and 0 to 160 kPa (0-16 T/m2)