软土初始动剪切模量及函数计算分析  

Calculation and Analysis of Original Dynamic Shear Modulus and Function of Soft Clay

作　　者：骆俊晖[1] 缪林昌[1] 石文博[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《东北大学学报（自然科学版）》2015年第8期1193-1198,共6页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51278099);江苏省普通高校研究生科研创新计划项目(CXLX13_098)

摘　　要：为了深入研究软土在移动地铁荷载作用下产生的软化现象,对南京软土进行室内GDS动三轴试验.采用初始动剪切模量计算公式对南京软土进行计算和比较分析,建立考虑频率影响因素的经验计算公式.同时提出考虑振动次数的动剪切模量函数计算公式,对南京软土进行计算和分析,并用不同地区的土验证公式适用性.结果表明:考虑频率影响因素的初始动剪切模量计算公式能更准确地计算初始动剪切模量,提出的考虑振动次数的动剪切模量函数计算公式对不同地区土的适用性较好.To research soft clay softening induced by moving metros load, an indoor GDS dynamic triaxial test on Nanjing soft clay was carried out. The computational formula with the original dynamic shear modulus was used to calculate and analyze the Nanjing soft clay. And an empirical formula considering the frequency factor was established. Meanwhile, a function considering the vibration number for the dynamic shear modulus was presented to calculate and analyze the Nanjing soft clay and the applicability was verified by testing on clay from different regions. It is shown that the original dynamic shear modulus formula considering the frequency factor can be accurately determined and the dynamic shear modulus function considering the vibration number has a good applicability to the clay from different regions.

关 键 词：软土 动荷载 动力参数 动剪切模量 GDS 

分 类 号：TU470[建筑科学—结构工程]