In-Situ Undrained Shear Strength of Two Marine Clays

1 September 1976

journal article
Published by American Society of Civil Engineers (ASCE) in Journal of the Geotechnical Engineering Division

Vol. 102 (9) , 989-1005
https://doi.org/10.1061/ajgeb6.0000327

Abstract

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 S_u/β_v_o from UUC tests and field vane tests were correlated with the overconsolidation ratios of these sediments and compared with the results of K_o-consolidated undrained triaxial compression (CK\a*_o\a*U\a*C), and direct-simple shear (CK\a*_o\a*U\a*DSS) tests.

Keywords

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