oa Civil Engineering = Siviele Ingenieurswese - Estimating settlements on cohesionless soils from SPT data

Volume 19, Issue 12
  • ISSN : 1021-2000



An improved version of a method proposed by the writer a few years ago for estimating the initial settlements of structures founded on sands is presented. The California Bearing Ratio (CBR) test is considered to be a model of a prototype of which the settlement is desired. CBR values are determined from Standard Penetration Test or dynamic cone CBR Penetrometer Test data. In the past the application of this approach was hampered by the lack of knowledge about the stress history of the particular soil profile. A procedure for determining this state is now advanced. From this results are derived which give an insight into the geological history of the soil profile. The effect of the presence of a water table, lowering the water table or altering the overburden pressures before a load is applied is taken into account. Several case studies reported in the literature since this approach was originally proposed have been analysed to verify the method and to illustrate its application.

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