VARIATIONS IN PORE PRESSURE AND STABILITY DURING PILE DRIVING IN SLOPES

ENDRING I PORETRYKK OG STABILITET VED RAMMING AV PELER I SKRAANINGER

Pile driving in clay slopes results in increased pore pressure and reduced slope stability. In order to perform reliable stability analyses on a total stress basis, it is necessary to know the pore pressure distribution during and after the pile driving. This report gives a survey of existing literature on this topic and describes stability analyses related to pore pressure observations. Observations indicate that the pore pressure may increase by a factor 1,3-1,5 within the pile group for pile driving in Norwegian clay slopes. The pore pressure dissipation is rather slow and only a 40% reduction is observed one month after driving. Outside the pile group an increase in the pore pressure is observed the first month after driving. Stability analyses are performed on three different clay slopes. The effect of varying locations of the pile group in the slope are investigated together with variations in the pile group dimensions. In addition variations in the factor of safety with time after driving are studied. /TRRL/

  • Corporate Authors:

    Norges Tekniske Hogskole

    Institutt for Geoteknikk og Fundamentefingslaere
    7034 Trondheim-NTH,   Norway 

    RINGSLAERE

    ,    
  • Authors:
    • Hoem, O I
  • Publication Date: 1975-12

Language

  • Norwegian

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 110 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184279
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Thesis
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM