新近沉积粉土动模量和阻尼比的试验研究  

Experimental Study on Dynamic Shear Modulus and Damping Ratio of Recently-sedimental Silty Soil

作　　者：杜海金[1] 高博[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《工程勘察》2006年第12期27-31,共5页Geotechnical Investigation & Surveying

基　　金：建设部攻关项目(编号:01-2-01)

摘　　要：选择邯郸市区5个工程的粉土土样,采用DDS-70微机控制电磁式振动三轴仪对非饱和粉土的动模量和阻尼比进行了试验研究,探讨了围压、剪应变、孔隙比、粘粒含量等对它们的影响;运用Hardin-Drnevich模型对动三轴试验结果进行整理分析,并通过统计计算提出了邯郸市确定粉土动模量的初步公式,为地基基础设计提供了依据。Through Choosing the testing samples of silty soil from five projects in Handan downtown, the tests are carried for the dynamic shear modulus Gd and the damping ratio λ of unsaturated silty soil by using dynamic triaxial apparatus with the DDS-70 computer controlled electromagnetic type. The effects of the confining pressure, the level of shear strain, porous ratio and clay particle content to the modulus and the ratio are discussed and the results from the tests are analyzed by using Hardin-Drnevich model. The formula for the dynamic shear modulus of the silty soil in Handan downtown areas is given, which provides the basis for the foundation design.

关 键 词：土动力学 粉土 动剪切模量 阻尼比 动三轴仪 

分 类 号：TU453[建筑科学—岩土工程]