广东工业大学学报2025，Vol.42Issue(2)：121-128,8.
沉积角对岛礁珊瑚砂力学特性影响的真三轴试验及本构模型研究
True Triaxial Shear Test and Constitutive Model Study of the Effect of Depositional Angle on the Mechanical Characteristics of Coral Sand
摘要
Abstract
Coral sand is the preferred backfill material for reef foundation engineering due to its complex particle morphology and highly porous structure.The mechanical properties of coral sand deposits exhibit significant anisotropy resulting from gravitational sedimentation processes and inherent particle characteristics.This investigation conducted true triaxial drained shear tests on South China Sea coral sands to systematically evaluate the influence of intermediate principal stress coefficient and initial deposition angle on mechanical responses.Experimental findings reveal two critical trends:(1)Peak shear strength demonstrates marked enhancement with increasing intermediate principal stress coefficient,accompanied by reduced dilatancy effects;(2)Progressive attenuation of peak strength occurs with elevation of initial deposition angle.A novel three-dimensional anisotropic constitutive model was developed within the theoretical framework of bounding surface plasticity.Model validation through comparative analysis with true triaxial test data confirms its predictive capability.These research outcomes establish a theoretical basis for evaluating three-dimensional bearing capacity characteristics of coral sand foundations in South China Sea reef engineering applications.关键词
真三轴/中主应力系数/各向异性/状态相关/珊瑚砂Key words
true triaxial test/intermediate principal stress coefficient/anisotropy/state dependency/coral sand分类
建筑与水利引用本文复制引用
邬文浩,吴杨,彭伟锋,黄云龙,张小燕,陈碧..沉积角对岛礁珊瑚砂力学特性影响的真三轴试验及本构模型研究[J].广东工业大学学报,2025,42(2):121-128,8.基金项目
国家自然科学基金资助项目(52311540020) （52311540020）
广东省自然科学基金资助项目(2024A1515010170) （2024A1515010170）
广州市科技计划项目(2024A04J4771) （2024A04J4771）
广州市教育局项目(202235224) （202235224）
广州大学校内科研项目(YJ2023025) （YJ2023025）
大学生创新创业项目(202311078056) （202311078056）
大学生创新创业项目(XJ202311078103) （XJ202311078103）
