GROUND MOVEMENTS CAUSED BY A BENTONITE--SUPPORTED EXCAVATION IN LONDON CLAY

The note describes the results of the measurements of horizontal and vertical movement in instrumented vertical boreholes drilled prior to bentonite-supported excavation of a trench in London clay. The analytical approach involves equating the supporting forces acting on the excavation side wall with disturbed forces acting in an assumed failure wedge behind the sidewall. As it is difficult to postulate the pressure distribution behind a slurry supported sidewall, direct observations are made and reported. It is observed that the deformation is mainly horizontal, the maximum occurring uniformly at a depth of 5-6 meters, and that the ground is not affected 6.1 meters from the side wall, the excavation trench being 6.1 meters long, 0.8 meters wide, and 15 meters deep. /TRRL/

  • Availability:
  • Authors:
    • FARMER, I W
    • Attewell, P B
  • Publication Date: 1973-12

Media Info

  • Features: Figures; References;
  • Pagination: p. 576-581
  • Serial:
    • GEOTECHNIQUE
    • Volume: 23
    • Issue Number: 4
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00261441
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 22 1974 12:00AM