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Home »  Civil Engineering Equipment » Soil Testing Equipment » Vane Shear Apparatus


Vane Shear Apparatus

Vane Shear - (VSA-01)

Soft and sensitive soils whose shear strength is less than 15 KN/m2, the results are dependent on operator's skill. Even pushing the sample tubes in soil may cause some disturbance. Experience shows that carefully controlled compression test results can be related to figures obtained by pushing a small vane in the soil and rotating it at a controlled rate and measuring the force, required for maximum resistance. Vane Shear Test can be conducted in a laboratory or in the field.


Laboratory Vane Shear (Motorised) - (VSA-02)

Specifications: Consists of a torque head adjustable in height by means of a lead screw rotated by a drive wheel to enable the vane to be lowered into the specimen. Rotation of the vane is by means of a electrically which operates a worm gear arrangement during the upper end of a calibrated torsion spring. Vane dia., rod dia., vane size & vane height as per IS specifications. The Vane Shaft is attached through the hollow upper shaft to a resettable pointer, which indicates the angle of torque on a dial graduated in degrees. The dial reading multiplied by spring factor gives the torque. A container for soil sample is also supplied, and a sampling tube of 38 mm I.D. & 150 mm long can also be used as container. Supplied with set of four springs, one each of approx. 2 kg.cm., 4 kg.cm., 6 kg.cm., and 8 kg.cm. Complete as above in a wooden carrying case.Rate of rotation is 1/60 r.p.m. Suitable for operation on 230 volts, single phase, 50 cycles, A.C.supply.


In Situ Vane Shear Test - (VSA-03)

The apparatus is designed for conducting in situ vane shear test from bottom of a bore hole in saturated cohesive deposits for determining their in place shearing resistance. Specifications: The equipment consists of a torque applicator assembly mounted on a base. A gear wheel, which is marked in degrees, holds a torque ring and is geared to a crank. The torque ring is a split ring and deforms as torque is applied and the deformation is indicated by a dial guage. A calibration Chart to convert dial gauge readings to torque force in kg.cm. is supplied. A pointer is provided for registering the rotation of the vane. A detachbale stand is provided to anchor the instrument. An attachment to security hold the string of rods is provided. The equipment comprises of the following: Torque applicator assembly capacity 2000Kg. cm. with split proving ring and dial gauge 0.002mm X 5mm complete with stand. Vane (with vane rod) 37.5mm dia X 75mm high 1 No. Vane (with vane rod) 50mm dia X 100mm high 1 No. Torque rod (Square Cross section) 0.6mtr. Long 1 No. Rods, quicks coupling type, 1mtr. long 25 Nos. Rods, quicks coupling type, 1/2mtr. long 10 Nos. Dummy rod, corresponding to 37.5mm dia vane 1 No. Dummy rod, corresponding to 50mm dia vane 1 No.
Salient Features
  • Essential Accessories:
  • Guide with ball bearing arrangement for alignment of the string of rods for use with 10cm casing pipe.
  • Guide with ball bearing arrangement for alignment of the string of rods for use with 15cm casing pipe.
  • Accessories
  • Vane (with vane rod) 65mm dia X 130mm high
  • Vane (with vane rod) 75mm dia X 150mm high
  • Vane (with vane rod) 100mm dia X 200mm high
  • Dummy rod, corresponding to 65mm dia vane
  • Dummy rod, corresponding to 75mm dia vane
  • Dummy rod, corresponding to 100mm dia vane
  • Note: Drilling equipment including casing for bore hole and jacking arrangement which are required for performing the test do not form a part of the above outfit.


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