基于Burgers模型的软黏土流变特性分析  

Analysis of Rheological Properties of Soft Clay Based on Burgers Model

作　　者：钱玉林 糜长林 王桦 祝捷 

机构地区：[1]扬州大学岩土工程研究所,江苏扬州225127

出　　处：《路基工程》2016年第2期14-17,49,共5页Subgrade Engineering

基　　金：国家自然科学基金:桩承式加筋路堤设计理论研究(50908198)

摘　　要：以扬州某高层建筑的软黏土地基工程为依托,基于Burgers模型,对软黏土的流变特性进行了研究。结果表明:弹性系数影响瞬时应变值、起始蠕变量,黏性系数主要影响起始蠕变率、起始蠕变量、稳定蠕变率;土体长时间发展的位移值是初期瞬时变形的数倍。软黏土的流变特性对高层建筑桩基的后期变形产生很大的影响,在高层建筑的桩基设计中,应特别注意。建议对某高层建筑的桩基应予加固。Based on engineering of soft clay foundation of a high-rise building in Yangzhou,the Burgers model is used to study the rheological properties of soft clay. Results show that elastic coefficient will influence instantaneous strain value and initial creep value; while viscosity coefficient mainly affect the initial creep rate,initial creep value and steady creep rate. The displacement value of soil in a long time is several times as much as the initial instantaneous deformation. The rheological properties of soft clay have significant influence on later deformation of pile foundation of high-rise building,which shall be paid great attention to in the design of pile foundation of high-rise building. It＇s suggested that the pile foundation of a high-rise building should be reinforced.

关 键 词：BURGERS模型 有限元分析 蠕变变形 非线性流变 

分 类 号：TU441.31[建筑科学—岩土工程]