Abstract

This study investigated effects of initial deviatoric stress state and the orientation of their major principal stresses on the strain components and shear strength of soft marine clay. Hollow cylinder test results demonstrated that the axial and circumferential strain component magnitudes substantially depended on the initial deviatoric stress and the principal stress direction. The octahedral shear indicated the highly anisotropic microstructure of the clay, and the initial deviatoric stress significantly affected the octahedral shear strain development and influenced the anisotropic microstructure. The results can provide an experimental basis for constitutive modeling of marine clay and provide guidance for ocean engineering.

摘要

本研究调查了初始偏应力状态及其主要主应力方向对软海相粘土应变分量和剪切强度的影响。空心圆柱体试验结果表明，轴向和周向应变分量的大小在很大程度上取决于初始偏应力和主应力方向。八面体剪切表明粘土具有高度各向异性的微观结构，初始偏应力显着影响八面体剪切应变的发展并影响各向异性微观结构。研究结果可为海洋黏土本构建模提供实验依据，为海洋工程提供指导。