VANE TESTS (VST)
The Vane Tests consists of four rectangular blades that are pushed into the ground to the desired depth. Once the depth is reached, the blades are rotated in a standard, constant speed.
The resistance of the soil increases until the soil shears, and these readings provide the undrained shear strenght. This test is standardized by ASTM-D2573 and NBR-10905 (in Brazil).
With the vane readings it is possible to obtain:
Icone Vane Test
Vane Test results