摘要
为了研究深层砂土剪切波速度,首先假设深层砂土为不规则排列等球体颗粒的集合体,在颗粒接触理论以及细观颗粒弹性力学的研究成果上推导出砂土的等效剪切模量,继而得到宏观剪切波速计算公式;然后分析了孔隙率、饱和度、内摩擦角、土粒密度、应力大小以及砂土颗粒的弹性模量和泊松比等因素对剪切波速的影响,最后将理论方法计算结果与深层砂土实测剪切波速进行了对比验证.结果表明:理论方法计算得到的结果与实测结果吻合较好,剪切波速度主要受孔隙率、应力大小及砂土颗粒弹性模量等因素影响显著;高应力状态下,尤其是当密实度达到100%后,应力增长会导致剪切波速继续增加.
Assuming deep buried sand is an aggregate of randomly packed uniform spheres,the equivalent shear modulus and the formula of shear wave velocity（V s） in sand media were derived based on the the spheres-contact theory and the research results of microscopic particles elasticity.Seven influencing factors were analyzed,including porosity,saturation,internal friction angle,soil grain density,magnitude of stress,elastic modulus of sand grain and Poisson ratio of sand grain.The results were compared with the measured data,and the calculated value of V s were generally in good agreement with the measured values.This study indicates that the value of V s is mainly influenced by porosity,magnitude of stress and the elastic modulus of sand grain,and the shear wave velocity increases with the increasing of stress in high stress state,especially after the degree of density achieves 100%.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2011年第4期99-103,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(5107833)
