中山大学学报（自然科学版）（中英文）2025，Vol.64Issue(2)：1-11,11.DOI:10.13471/j.cnki.acta.snus.ZR20240232
不同粒径钙质砂的侧限变形及内部应力演化
Lateral deformation and internal stress evolution of calcareous sand with different particle sizes
摘要
Abstract
In the study,lateral compression and creep tests were performed on calcareous sands of varying particle sizes using a self-designed acrylic model box.The research focused on investigating the compression deformation,characteristics of particle breakage,and the evolution of internal stress in calcareous sand under various stress levels.The results indicate that when vertical stress is relatively low,the compression deformation,creep strain,and creep rate of calcareous sand decrease as particle size increases.Conversely,under higher vertical stress,these variables increase with particle size.This behavior is attributed to the fact that the deformation of calcareous sand is controlled by the rearrangement of particle positions and the extent of particle breakage.At low vertical stress,particle breakage is minimal and can be overlooked;as the particle size of calcareous sand increases,the irregularity of particle shapes also increases,which enhances inter-particle locking and thus suppresses deformation.However,as vertical stress increases,considerable particle breakage occurs in calcareous sand;moreover,larger particle sizes lead to more significant particle breakage.This exacerbates deformation,alters the particle contacts,and intensifies stress redistribution.Consequently,the distribution of vertical and lateral stresses within the calcareous sand shifts from a Weibull distribution to a normal distribution.During the creep process,the internal stress distribution of calcareous sand tends to become uniform.关键词
钙质砂/颗粒破碎/蠕变/颗粒粒径/应力分布Key words
calcareous sand/particle breakage/creep/particle size/distribution of stresses分类
土木建筑引用本文复制引用
袁泉,施旭,高燕,江雨潮,孙乐..不同粒径钙质砂的侧限变形及内部应力演化[J].中山大学学报（自然科学版）（中英文）,2025,64(2):1-11,11.基金项目
国家自然科学基金(42072295) （42072295）
国家重点研发计划(2022YFC3005203) （2022YFC3005203）
