珠江口海洋软土动三轴试验分析  

Dynamic Triaxial Test Analysis of Marine Soft Soil of the Pearl River Estuary

作　　者：陈章毅[1] 宋金良[1] 刘文程[1] 廖原[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《华南地震》2014年第B04期204-207,共4页South China Journal of Seismology

基　　金：973项目"近海重大交通工程地震破坏机理及全寿命性能设计与控制"(2011CB013600)

摘　　要：为了分析海洋软土在动力作用下的动力特性,采用了DDS-70型号电磁式动三轴仪器对试样进行分析,分别探讨了海洋软土在不同的加载频率、不同的围压、不同的干密度下的动弹性模量、动强度、动阻尼比等参数的变化规律:通过试验分析得出,频率越大,剪应变的变化范围随着频率的增大而减小;干密度越大,其动剪模量越高;围压越大,当剪应变小于10-4时,曲线呈现出急剧下降趋势。In order to analyze the dynamic performance of the Marine soft soil under dynamic action, adopted DDS - 70 type electromagnetic dynamic triaxial apparatus to analyze sample, respectively discusses the Marine soft soil in different frequencies, different confining pressure and the different dry density of dynamic to analyze the elastic modulus, dynamic strength and dynamic damping ratio parameters change rule; Through experimental analysis, the greater the range of shear strain decreases with the increase of frequency, the greater the dry density, the dynamic shear modulus is higher, the greater the confining pressure, when the shear strain is less than 10-4, curve showing a sharp decline.

关 键 词：海洋软土 动三轴仪 动阻尼比 动弹性模量 

分 类 号：TU411[建筑科学—岩土工程]