DETERMINATION OF THE MODULUS OF DEFORMATION OF A TILL USING A PRESSUROMETER

The authors give an account of the construction, use and results obtained with a pressurometer based on Menards design which has been used to determine the modulus of deformation of a glacial till. After pointing out the need for in situ tests in such material, they give an account of the development of various models of pressurometers and details of the instrument that they employed. This was air inflated using a transducer to measure the pressure in the device which transmitted readings to the control above ground, and used a radial sensing unit to measure the expansion of the probe. The result displayed is the sum of the voltages given by 6 or more potentiometers geared to the movement of the membrane. Results were interpreted according to methods published by Gibson and Anderson, Ladanyi, Palmer and Jezlquel, an outline of each method being given. The results based on these interpretations are compared with results of triaxial compression tests on material obtained from the same site and of plane tests made at a corresponding depth down the borehole. It was found possible to make tests as close as 0.5M to each other in depth. Pressurometer testing was found to be rapid and to obviate the need for sampling and trimming specimens for laboratory tests. It is pointed out that further investigation is needed to establish which test method (and interpretation) most nearly represents the deformation behaviour of a glacial till mass, however the disadvantages of the pressurometer method are said to be equally applicable to the laboratory methods. /TRRL/

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  • Corporate Authors:

    Wells (Edward) and Sons, Limited

    143/145 Camberwell New Road
    London SE5,   England 

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • Mckinlay, D G
    • ANDERSON, W F
  • Publication Date: 1975-11

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 51-54
  • Serial:
    • GROUND ENGINEERING
    • Volume: 8
    • Issue Number: 6
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00134240
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 4 1976 12:00AM