岩土工程学报2025，Vol.47Issue(z2)：62-67,6.DOI:10.11779/CJGE2025S20029
颗粒破碎对珊瑚砂静止土压力系数的影响研究
Influence of particle breakage on coefficient of earth pressure at rest for coral sand
摘要
Abstract
To investigate the influence of particle breakage on the coefficient of earth pressure at rest(K0)of coral sand,this study employs coral sands from the South China Sea for saturated K0 consolidation tests under single-particle-size conditions.The particle breakage is quantified using the relative breakage rate,and the effects of particle size,relative density,and vertical stress on K0 are systematically analyzed.The results demonstrate that:Under the action of high stress,particle breakage weakens the transmission ability of lateral stress,resulting in the average value of K0 being higher than its stable value at 1600 kPa.For a given particle size and identical vertical stress level,higher initial relative density correlates with reduced lateral effective stress during consolidation.Moreover,the influence of relative density on test outcomes becomes increasingly pronounced with escalating vertical loading.A predictive formula for K0 incorporating particle breakage is established.This formula can be used to quantify the effects of particle breakage on the coefficient of earth pressure at rest for coral sand.Particle breakage is identified as the primary driver of K0 reduction in coral sand.The proposed formula provides a theoretical foundation for earth pressure calculations in island and reef engineering projects.关键词
珊瑚砂/K0固结试验/颗粒破碎/静止土压力系数/单一粒径Key words
coral sand/K0 consolidation test/particle breakage/coefficient of earth pressure at rest/single particle size分类
建筑与水利引用本文复制引用
侯贺营,陈志朋,王炳辉..颗粒破碎对珊瑚砂静止土压力系数的影响研究[J].岩土工程学报,2025,47(z2):62-67,6.基金项目
国家自然科学基金项目(51978317,51979128) （51978317,51979128）
