Shear Strength and Dilatancy of Calcareous Sand in the South China Sea

作     者：PEI Hui-min WANG Dong PEI Hui-min;WANG Dong

作者机构：Shandong Provincial Key Laboratory of Marine Environment and Geological EngineeringOcean University of ChinaQingdao 266100China Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2022年第36卷第5期

页      面：781-790页

核心收录：

学科分类：081505[工学-港口、海岸及近海工程] 081401[工学-岩土工程] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.U1806230 and 42025702) 

主　　题：calcareous sand triaxial tests friction angle dilatancy drained South China Sea 

摘      要：The shear strength and dilatancy of typical uncemented calcareous sand from the South China Sea are investigated by soil lab *** to drained triaxial tests at various relative densities and confining stresses,it is found that the constant volume friction angle is approximated as 39°and the traditional Bolton’s equations can be modified to estimate the peak friction angle and dilation *** reliability of the equation proposed for the peak friction angle is verified in terms of calcareous sands from more onshore and offshore sites worldwide,while the errors of the predicted dilation angles scatter in a relatively large ***,the dilation angles of sands in the South China Sea are estimated by the equation presented with an error of±30%.The peak friction angle measured by the undrained is similar to that by the drained tests as the relative density smaller than 60%,while the former is slightly lower for denser samples.