不同初始固结度吹填土蠕变特性研究  

Creep characteristics considering consolidation degree of dredger fill

作　　者：杨爱武[1,2] 张艳[1] 

机构地区：[1]天津市软土特性与工程环境重点实验室,天津300384 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《岩土工程学报》2013年第S1期222-226,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51179186);天津市科技发展计划项目(06YFSZSF04000)

摘　　要：通过TSS10三轴流变仪,对不同初始固结度吹填土蠕变特性进行了研究。试验结果表明,固结度对吹填土蠕变变形影响明显。固结度越小,蠕变变形越明显;增大固结度,能够在一定程度上减小蠕变变形。蠕变变形黏滞系数与固结度和有效固结应力大致呈线性单调增函数关系。蠕变破坏强度随固结度的增大依次增大,但都小于瞬时强度。不同固结度蠕变应力-应变等时曲线均可用双曲线函数进行拟合。Creep characteristics considering the different initial consolidation degrees of dredger fill are studied by using triaxial rheometer TSS10.The results show that consolidation degree has an obvious influence on creep deformation of dredger fill.The creep deformation is more obvious when the consolidation degree is smaller.The increase of consolidation can reduce the creep deformation in a certain degree.The relationship among viscosity coefficient of the creep deformation,consolidation degree and effective consolidation stress substantially is a linearly increasing function.The creep damage strength increases with the increase of the consolidation degree,but is less than the instantaneous strength.The creep stress-strain isochronous curves under different consolidation degrees can be fitted by means of the hyperbolic function.

关 键 词：固结度 吹填土 蠕变:等时曲线 黏滞系数 

分 类 号：TU411[建筑科学—岩土工程]