The possibility of evaluating in situ horizontal stress during cone penetration has been suggested by recent laboratory calibration chamber research. This has been confirmed by field trials with lateral stress sensing cones. A lateral stress piezocone developed at theuniversity of british columbia is described. Detail is given of thelaboratory calibration procedures and corrections for cross talk and temperature effects. Field data from two lower mainland sites are presented to evaluate the amplification of lateral stress that occurs in sands during penetration of full-displacement probes. The results suggest that lateral stresses measured in granular soils with thels cone are dependent on, inter alia, the existing horizontal stress, in situ state of the sand, and its grain characteristics. This paper appears in transportation research record no. 1278, Dynamic testing of aggregates and soils and lateral stress measurements 1990.
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