基于振次影响的软土动力参数模型  

Vibration Times based Dynamic Parameter Model of Soft Clay

作　　者：刘海伟[1] 毛璐明 李华[3] 易勇生 

机构地区：[1]西安理工大学岩土工程研究所,西安710048 [2]陕西省电力公司电力经济技术研究院,西安710075 [3]上海市政工程设计研究院,上海200092

出　　处：《地下空间与工程学报》2016年第5期1254-1258,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金青年基金科学基金(51409208);陕西省教育厅科学研究计划专项项目(14JK1514)

摘　　要：为了深入研究软土的软化现象,对软粘土进行了一系列的动三轴试验。在软土动力三轴试验的基础上,采用最大动剪模量的计算公式,对软土进行了计算和比较,建立了考虑频率影响因素的经验公式。同时,给出了振次曲线的动态参数的拟合公式,计算分析了软土的动态参数,并验证了该公式的适用性。结果表明,考虑频率影响因素的计算公式能更准确地计算出动态参数,提出的曲线拟合计算公式对不同地区土的适用性较好,可以推广使用,便于进行理论分析以及工程运用。In order to research on softening phenomenon,a series of dynamic triaxial test for soft clay was conducted. Based on the dynamic triaxial test of soft soil,a calculation formula of the maximum dynamic shear modulus is used to calculate and compare the soft soil,and a empirical formula for calculating the frequency influence factors is established. At the same time,a fitting formula for the dynamic parameters of the relationship curve of vibration is presented,and the dynamic parameters of soft soil are calculated and analyzed,and the applicability of the formula is verified by the soil in different regions. The results show that the computational formula which considers frequency factor could calculate dynamic parameter with more accuracy and the curve fitting computational formula would have a better applicability to different clay and be convenient for theoretical analysis,as well as engineering application,so it should be generalized.

关 键 词：软土 循环荷载 动力参数 动剪切模量 动阻尼比 

分 类 号：TU447[建筑科学—岩土工程]