A COMPARATIVE STUDY BETWEEN THE NGI DIRECT SIMPLE SHEAR APPARATUS AND THE MIKASA DIRECT SHEAR APPARATUS

SOILS AND FOUNDATIONS

HIDEO HANZAWA¹  Y. X. TANG²  NIGEL NUTT⁴  MICHAEL LONG⁵  TOM LUNNE³ 

[1] Toa Corporation;Kanmon Kowan Construction Co., Ltd.;Norwegian Geotechnical Institute;Apis Consulting Group;University College Dublin

关键词: direct shear test;    direct simple shear test;    laboratory tests;    sample disturbance;    soft clays;    (IGC: C6/D6);   

DOI  :  10.3208/sandf.47.47

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(32)A comparative study of the NGI Direct Simple Shear Test (DSST) and the Mikasa Direct Shear Test (DST) is reported. Samples from Norwegian Drammen clay and Japanese Ariake clay were subjected to both types of test. An evaluation of these test results and a theoretical consideration on the different shearing mechanisms has shown that although the DST give generally higher stiffness and strength than the DSST, these differences can mainly be accounted for by the different shearing mechanisms and shearing rates. Sample disturbance due to transportation and handling may also be the reason for some of the difference. A technique for evaluation of sample disturbance in the DSST is presented and evaluated. Tests on undisturbed and remoulded Drammen clay consolidated to stresses much higher than the in situ effective overburden stress give almost identical results. Thus the effects of sample disturbance and in situ structure in the clay were eradicated.

【 授权许可】

Unknown