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ROCTEST M-1000 Instruction Manual
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ROCTEST M-1000 Instruction Manual

Field vane shear tester
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INSTRUCTION MANUAL
FIELD VANE SHEAR TESTER
Model M-1000 (NILCON)
 Roctest Limited, 2012, 2018, 2019, 2020. All rights reserved.
Installation and use of this product may sometimes be dangerous. It must only be used by qualified personnel. The instructions in this manual are for guidance only and are
subject to change. The Company does not accept any responsibility for any damage or loss which may arise from installation or use of this product.
Tel.: 1-450-465-1113 • 1-877-ROCTEST (Canada, USA) • 33 1 64 06 40 80 (France) • 41 91 610 1800 (Switzerland)
www.roctest.com
E10046-19032020

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Summary of Contents for ROCTEST M-1000

  • Page 1 The Company does not accept any responsibility for any damage or loss which may arise from installation or use of this product. Tel.: 1-450-465-1113 • 1-877-ROCTEST (Canada, USA) • 33 1 64 06 40 80 (France) • 41 91 610 1800 (Switzerland) www.roctest.com...

  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION ............................1 2. INSTRUCTIONS FOR USE IN A CASED BOREHOLE ................4 3. INSTRUCTIONS FOR USE WITH A PORTABLE BORING RIG ............. 7 4. INTERPRETATION OF THE VANE BORING CURVE ................8 5. INSPECTION AND MAINTENANCE ...................... 10...

  • Page 3: Description

    E10046-19032020 1. DESCRIPTION The M-1000 (NILCON) shear vane tester is a measuring device used to estimate in situ the shear strength of cohesive soils. Test results are recorded on a waxed paper disk to form a permanent record. The recording head is mounted on either a casing or a hollow auger using an adapter, and the vane is pushed at the bottom of the borehole, or it is mounted on a portable boring rig used for pushing the rods into the ground.
  • Page 4 M-1000 E10046-19032020 1.3 Boring Rods The rods are designed to prevent them from rotating with respect to each other when they are properly tightened. They are fitted with flats at each end so that they can be locked with an open-ended spanner. The rods must be smooth, clean and dry (free of oil or grease) for the clutch to engage correctly.
  • Page 5 Clutch in disengaged and engaged position 1.5 Installation Support The M-1000 recording head requires an installation support. Three options are possible: The test can be performed in a cased borehole using a boring rig. The recording unit is secured to the casing with an adapter (provided by Roctest).

  • Page 6: Instructions For Use In A Cased Borehole

    A small pipe wrench is used to hold the shaft of the vane head. The spanners provided by Roctest are used for holding the rods, and an adjustable wrench is used for holding the slip coupling.
  • Page 7 M-1000 E10046-19032020  Place a disk of waxed paper into the recording head without lifting the needle too high, so as not to bend it. Turn the paper once counterclockwise to trace a line to act as a zero-reference during the test.
  • Page 8 M-1000 E10046-19032020  Disengage the clutch. Screw on the next rod and continue to push it in. Tests must be at least 0.5 m apart. The point of the vane sets the depth reference.  If a test is performed in a soft layer underlying a layer of firm and sticky clay, the results may be afected by the effect of clay accumulating on the vane when it passes through this layer.

  • Page 9: Instructions For Use With A Portable Boring Rig

    M-1000 E10046-19032020 3. INSTRUCTIONS FOR USE WITH A PORTABLE BORING RIG The vane shear tester is sometime used with a portable boring rig. The instructions for inserting the vane are then different:  The base-frame of the boring is fastened to the ground with the earth augers. These are screwed down with one of the crank handles of the boring rig, or with a power drill.

  • Page 10: Interpretation Of The Vane Boring Curve

    M-1000 E10046-19032020 4. INTERPRETATION OF THE VANE BORING CURVE Reference Line Waxed Paper Disc Remolded Test Typical graph A graph for a typical vane shear test is shown above. The radial distance “a” from a point on the graph to the reference line is directly proportional to the torque “M”...
  • Page 11 M-1000 E10046-19032020 With the remolded test, one does not in certain cases get a distinct difference between a and a . This is because the reaction torque from the disturbed clay is so small that it is not high enough to move the slip coupling. In other words, this means the torque required to turn the vane tester is less than the torque needed to turn the slip coupling (3 to 5 kg x cm).

  • Page 12: Inspection And Maintenance

    Please read all parts of the text underlined for precautions in using the device and maintenance advice.  The M-1000 recording unit must be periodically returned to Roctest for inspection and calibration.  The recording unit is delivered with a small piece of cardboard under the needle to protect the aluminum platen.
  • Page 13 M-1000 E10046-19032020  If the slip coupling is damaged or if a torque of more than 5 kg x cm is needed to rotate the slip coupling, it will have to be returned to the factory for repair. In an emergency, a repair can be attempted on site...