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Introduction
-The Torvane shear device (ELE International model 26-2261
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; Figure
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13) enables the user to quickly determine the shear strength of cohesive soils.
Three sizes of vanes are supplied with torvane
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. The standard vane
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has a stress from 0 to 1 kg/cm2, this is also the approximate range of torque that can be easily applied by finger pressure.
It is used for fully saturated cohesive soils with undrained strength independent of normal pressure. The stress range permits it to be used for clays varying in consistency from very soft to stiff.
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A large vane is provided for use with remolded samples
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, and has a ratio of 0
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.2
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. A smaller vane with a ratio of
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2.
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5 is used with stiffer clays
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-
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The pocket penetrometer was develop by Soiltest Inc. for use for field engineers to check the visual classification of soils. The readings of the penetrometer were compiled from several thousand unconfined compression tests of silty and clay-like soils
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Measuring the Sample
Torvane
- Select the appropriate vane size and fit to vane driver (Figure 2).
Figure 2.- Vane driver and the 3 kinds of vanes.
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- 0.2, 1.0, 0.2 ratio)
0.22.51.0 
- Make sure zero on dial is aligned with index mark on knob
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- , rotating a counter-clockwise the dial face
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Figure 3.- Dial aligned.
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- Test the surface
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- should be reasonably flat and least two inches in diameter.
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- Press torvane into soil to depth of blades and maintain a constant vertical pressure while turning knob
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- . A rate of rotation such that failure develops in five to ten seconds is recommended
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Figure 4.- Shearmeter correct position.
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- After failure develops, release the remaining spring tension slowly and the index mark on the knob will indicate the maximum shear value
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Penetrometer
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The red
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ring
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on the barrel of penetrometer
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hold the maximum reading of the scale
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for
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esy reading
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Figure 6.- Red-ring in position to start measurement.
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- Slide the ring down against the instrument handle
- Grip the knurled portion of the handle and push the tip of the penetrometer into the soil to the
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- grove located ¼'' from the tip
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- Read the unconfined compression strength directly in tons per square foot (TSF) or kilograms per square centimeter (kg/cm2) from the scale. The reading is located in the red ring, side closest to the knurled handle
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Uploading the data
- Open the spreadsheet
Uploading Data to LIMS
- Open Shear_strength_Gantry.xlsx spreadsheet on the desktop for to enter the data (Figure 9).
Figure 9.- Shear_strength_Gantry.xlsx spreadsheet.
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- Scan the label of
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Figure 10.- Spreadsheet with sample information.
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- your sample
- Select the instrument on cell (torvane or penetrometer), and write
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- the
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- value
- Write the offset and select the
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- adapter number
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- (torvane
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- )
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- or
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- if you use it or no (penetrometer)
- Select the direction
Figure 11.- Measurement information on the spreadsheet.
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- in which you realize the measurement
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- Select the
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- "copy me" tab, down on spreadsheet and copy the rows with your sample data
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Figure 13.- Copy Me sheet.
7. Double-click the SpreadUploader icon on the desktop (Figure 14) and login using ship credentials.
Figure 14.- SpreadUploader icon.
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Open the SpreadUploader software and login into the app window. 
- Paste the copied rows data and validate the sheet
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- . A message will appear at the bottom if
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- everything is fine.
Figure 15.- Successful data validation.
Anchor _GoBack _GoBack
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- Select Upload in the Lims button. A message will appear at the bottom
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- when it is done
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That is all !!