大连理工大学学报2024，Vol.64Issue(4)：384-392,9.DOI:10.7511/dllgxb202404008
珊瑚砂抗剪强度及颗粒破碎影响因素试验研究
Experimental study of influencing factors of shear strength and particle breakage of coral sand
摘要
Abstract
Coral sand is brittle and easily broken,and its mechanical and deformation properties are different from those of quartz sand.To study the influence of particle size and precompression on the shear strength and particle breakage of coral sand,the confined compression test and triaxial shear test are carried out on coral sand samples.The mechanical and deformation properties of coral sand-quartz sand mixture in triaxial shear state are discussed.The results show that the crushed coral sand particles are mainly concentrated in the particle size one level smaller than the original particle size.The smaller the initial particle size is,the more obvious the particle clusters are.The particle size has a great influence on particle breakage,especially when the particle size of coral sand is larger than 1 mm.The particle size of coral sand after crushing is mainly greater than 0.25 mm.Precompression(particle breakage)will lead to the increase of coral sand internal friction angle.The addition of quartz sand has little effect on the internal friction angle.Both precompression and the addition of quartz sand will reduce the apparent cohesion,and the more the content of quartz sand is,the more the apparent cohesion decreases.Precompression,increasing the content of quartz sand and increasing the particle size will reduce the degree of particle clusters and increase the degree of particle breakage.关键词
珊瑚砂/颗粒破碎/抗剪强度/侧限压缩试验/三轴剪切试验Key words
coral sand/particle breakage/shear strength/confined compression test/triaxial shear test分类
建筑与水利引用本文复制引用
娄昕骐,刘文化,李吴刚..珊瑚砂抗剪强度及颗粒破碎影响因素试验研究[J].大连理工大学学报,2024,64(4):384-392,9.基金项目
国家自然科学基金资助项目(52009049,51709129). （52009049,51709129）
