外荷载作用下软土压缩模量动态演化规律  

Dynamic Evolution Pattern of Compression Modulus of Soft Clay

作　　者：牟春梅[1] 李佰锋 

机构地区：[1]桂林理工大学土木与建筑工程学院,桂林541004 [2]广东省冶金建筑设计研究院,广州510080

出　　处：《土木建筑与环境工程》2009年第4期49-54,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：广西建筑工程检测与试验重点实验室开放基金(桂科能07109005-08);广西建筑工程检测与试验重点实验室主任基金(桂科能07109005-03;桂科能07109005-04);广西自然科学基金(桂科自0848020;桂科自0728220)

摘　　要：软土在外荷载作用下,其体积减小是随时间发展而呈现不同的特点的,通常可划分为不同的沉降阶段,在这一过程中,其压缩性指标应该是不断变化的。以珠江三角洲地区某高速公路具有代表性软土为研究对象,结合生产单位的具体工程,在地基处理(超载预压)前后取淤泥质软土样,开展不同压力条件下的固结实验,获得了淤泥土在天然状态和超载预压固结后的压缩模量随压力和时间变化的数据,通过对数据综合分析,得到淤泥质土压缩模量随压力和时间演化的定量关系式,从而获得了压缩模量在压力变化条件下的动态演化规律。Under the external loads, the volume of soft clay decreases with the time and several subsidence phases could be classified with the during development characteristics. And the compression indicators should develop gradually. With the soft clay samples taken from representative soft base before and after geotechnical process in some express highway area of the Pearl River delta, indoor consolidation tests were carried out under different pressure levels. With the data analysis, quantitative relation formulas were obtained for the compression modulus of silt soil with pressure and time. Consequently, dynamic evolution pattern of compression modulus was obtained.

关 键 词：地基 固结试验 软粘土 压缩模量 演化规律 

分 类 号：TU411.5[建筑科学—岩土工程]