摘要
针对软土的结构性,通过人工制备具有一定颗粒胶结强度和初始孔隙比的结构性土样,对结构性软土进行共振柱试验以获得土体的动剪切模量,在此基础上研究结构性软土Gd/Gdmax-γd曲线的变化规律,分析影响其动剪切模量的主要影响因素,最后探讨初始孔隙比、固结围压对动剪切模量的影响规律,为工程上合理考虑结构性软土的动力特性提供参考依据。
Focusing on the structural properties of soft soil,the dynamic shear modulus of structural soft soil samples were obtained through the resonant column test. All the soil samples were artificially remodeled to maintain certain granular cementation strength and initial void ratio. Based on the test results,the variation rules of Gd/Gdmax-γdcurves of the structural soft soil were studied,the main factors affecting the dynamic shear modulus were analyzed. Finally,the influence of initial void ratio and consolidation confining pressure on the dynamic shear modulus were discussed. The results provide reference for the reasonable consideration of the dynamic characteristics of the structural soft soil in engineering.
作者
王继鑫
荣棉水
孟凡超
Wang Jixin;Rong Mianshui;Meng Fanchao(Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China;College of Geological Engineering,Institute of Disaster Prevention,Sanhe 065200,China)
出处
《建筑结构》
CSCD
北大核心
2018年第S2期935-939,共5页
Building Structure
基金
国家重点研发计划项目(2017YFC1500403)
国家自然科学基金项目(51878625)
北京市自然科学基金项目(8182056)
关键词
软土
共振柱试验
动剪切模量
初始孔隙比
围压
soft soil
resonant column test
dynamic shear modulus
initial void ratio
confining pressure
