It is used to measureNatural shear strength of saturated soft clay on site.

Test:Press cross slab head equipped with four blades into depth of the reservation, And cross slab head rotation, measure The resistance of the cylindrical surface is required formed by Vane shear head.

Then put the equivalent resistance of shear resistance on the surface of the cylindrical units

Due to the equipment in the determination of strength index in drilling need to use with drilling equipment, generally can do within 30 m shear test

Cross plate drilling rod should have sufficient strength under the condition of full load , in order not to make the drilling rod distorted, or Torque Angle of rotation curve must be amended