Unconsolidated-undrained (uu) triaxial and cone penetration testresults were used to develop correlations between undrained shear strength and cone resistance for three soft to medium alluvial clays in the san diego area. The cone factor relating the uu triaxial strength to the cone resistance, termed n sub kuu, had an average value and range of 11.0 Plus or minus 2.0, 11.0 Plus or minus 2.5, And 12.4 Plus or minus 0.8 For the lopez ridge, creekside estates, and rancho del oro sites in san diego, respectively. A data base of additional values of n sub kuu was compiled from the literature for nonfissured, normally to lightly overconsolidated clays (overconsolidation ratios ranged from 1 to 5). The data base of n sub kuu values showed considerably less scatter than that observed in previous cone factors on the basis of field vane shear tests. The reduction in scatter is believed to be due to the uncertainty in interpreting vane shear tests and the repeatability of uu triaxial tests when high-quality samples are available. This paper appears in transportation research record no. 1278, Dynamic testing of aggregates and soils and lateral stress measurements 1990.
Abstract