CASE STUDY ON STRENGTH EVALUATION OF SEABED USING SIMPLE CU STRENGTH INPLEMENTED IN PORT PROJECTS IN WESTERN JAPAN

Abstract

 Data of simple CU test, which is the triaxial compression test of clayey soil after the simplified recompression procedure, in ground surveys for port projects were collected at 6 ports in western Japan. The qualities of cohesive soil samples were evaluated based on the relationship between the shear strength obtained by the unconfined compressive strength S_u(UCS) and the simple CU strength S_u(SCU). In the result, 276 samples of 6 ports were classified into zone-I (the sample is good or very good)50.7%, zone-II(the quality of the sample is at the appropriate level)25.0%, zone-III (the quality of the sample is poor) 10.1%, and zone-IV (the quality of the sample is very poor) 4.1%.The average level of the quality was slightly higher than the “appropriate level”.