IN-SITU CONTROL OF SETTLEMENT FORECASTS BASED ON STATIC PENETRATION TESTS FOR 79 STRUCTURES ON 17 DIFFERENT SITES

CONTROLE IN SITU DES PREVISIONS DE TASSEMENTS BASEES SUR LES ESSAIS DE PENETRATION STATIQUE POUR 79 OUVRAGES SUR 17 SITES DIFFERENTS

The Company SOCOTEC has been using for a number of years the method recommended by Sanglerat, G to calculate settlement from static penetration tests. Settlement calculations were controlled by in-situ settlement measurements made during the construction of 79 buildings and structures on 17 different sites. 7 sites are along the Mediterranean coast, 1 in the Paris region and 9 near Lyon. Some settlement measurements are still regularly recorded. The soils studied were either clays or silts varying in thickness or sands and gravels. Foundations were either rafts or shallow foundations, the permissible stress of which varied between 0,3 and 2 dan/cm2. On some small bars installed 20 M deep, the stress rose to 18 dan/cm2. The method was also utilized to forecast the settlement of preloading embankments, the height of which varied from 3 to 11 M. A special study is made of an embankment on the Lyon-Chambery motorway, 9 M high, situated on a marsh consisting of 5 M of highly compressible soil on a compact substratum. Settlement measured varied from 5 mm to 1,70 M depending on the sites and structures observed. Those results are very near the forecasts based on static penetrometer test results, thus confirming the validity of the method proposed. The only case where settlement was overestimated is analyzed. (TRRL)

  • Corporate Authors:

    Societe de Diffusion de Tech du Bat et de Trav Pub

    9 rue la Perouse
    Paris 16e,   France 
  • Authors:
    • Sanglerat, G
    • Girousse, L
    • Bardot, F
  • Publication Date: 1979-2

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00311874
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: Nov 19 1980 12:00AM