Field testing was performed at an offshore site approx 2.8 miles (4.5 km) from the New Jersey coast, with water depths of 35 ft ± 5 ft (10.7 ± 1.5 m) to evaluate the undrained strength of two relatively young (8,000 ± yr old) cohesive marine soils; a stiff plastic clay (CH) and a medium-stiff, lean, slightly sensitive clay (CL). Numerous cnsolidation tests indicate that the relatively young Holocene sediments are precompressed resulting in overconsolidation ratios ranging from 3.5 to 6 for the plastic clay (CH) and between 5 and 25 for the silty clay (CL). The normalized undrained shear strength Su/βvo from UUC tests and field vane tests were correlated with the overconsolidation ratios of these sediments and compared with the results of Ko-consolidated undrained triaxial compression (CK*o*U*C), and direct-simple shear (CK*o*U*DSS) tests.
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Koutsoftas et al. (1976) studied this question.