Field Vane Shear Apparatus

Field Vane Shear Apparatus is a portable testing device used to determine the undrained shear strength of cohesive soils in the field.

It is commonly preferred in geotechnical engineering projects to rapidly and accurately evaluate the stability of soft clay layers and the bearing capacity of the ground. The working principle of the device is as follows: A four-blade vane is inserted into the soil using extension rods. Controlled torque is then applied to rotate the apparatus. The maximum torque recorded at the moment the soil fails and begins to rotate is used to calculate the undrained shear strength of the soil. The Field Vane Apparatus can be used with various vane sizes to suit different soil conditions, such as 16×32 mm, 20×40 mm, and 25×50 mm. The torque measuring unit is equipped with a highly accurate scale, ensuring reliable results.

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