AZA 0921 POCKET VANE SHEAR APPARATUS

Description

Pocket Vane Shear Apparatus, a vital geotechnical field tool, is designed for rapid and reliable assessment of undrained shear strength in cohesive soils. This lightweight, portable instrument allows engineers, soil scientists, and field technicians to perform accurate shear strength measurements directly at the site, eliminating the need to transport samples to the lab.

Ideal for preliminary site investigations, construction quality control, and slope stability analysis, the apparatus uses a torque-measuring mechanism coupled with a detachable vane system. The results offer quick insights into soil stability, crucial for safe foundation and earthworks planning.

Applications and Benefits:

The Pocket Vane Shear Apparatus is primarily used in:

• Field testing of soft cohesive soils, such as clays

• Shallow depth evaluations, especially in remote or difficult terrain

• Construction site assessments to determine if further stabilization is needed

• Research and academic studies for comparative field analysis

The tool eliminates the need for heavy drilling or coring equipment, providing practical, real-time results. Its compact build makes it easy to carry in a standard field kit. It is especially favored in preliminary or time-sensitive investigations.

Operating Principle:

A vane is inserted into the soil, and the operator rotates it using the built-in torque head. Resistance to rotation is measured via the calibrated scale or digital dial. The shear strength is then calculated using the torque value and vane geometry.

The vanes are interchangeable, typically in sizes of 16, 20, and 25 mm diameters, allowing adaptation to various soil consistencies.

Specifications:

FAQs:

Q1. What soil types can be tested with this apparatus?
The Pocket Vane Shear Apparatus is best suited for soft to stiff cohesive soils, especially clays. It is not recommended for granular or sandy soils.

Q2. Is this tool calibrated for accuracy?
Yes. It comes pre-calibrated and includes a conversion chart for torque to shear strength values. Calibration can be re-verified with standard torque tools.

Q3. Can it be used in saturated soil conditions?
Yes. It performs well in moist or saturated cohesive soils. However, excessive waterlogging may slightly reduce reading precision and should be noted.

Q4. What standards does it follow?
This tool adheres to ASTM D2573: Standard Test Method for Field Vane Shear Test in Cohesive Soil. You can review the standard here:
www.astm.org/d2573

Q5. Does it require any power source or batteries?
No. This is a mechanical instrument, ensuring it can be used in remote locations without access to electricity or charging equipment.