大连黏性土压缩指数与物理指标相关性分析  

Correlation Analysis Between Compression Index and Physical Parameters of Dalian Clayey Soils

作　　者：刘伽 朱斌 段磊 李舒静 LIU Jia;ZHU Bin;DUAN Lei;LI Shu-jing(Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi＇ an 710123,China)

机构地区：[1]西京学院陕西省混凝土结构安全与耐久性重点实验室,陕西西安710123

出　　处：《土木工程与管理学报》2018年第3期118-123,共6页Journal of Civil Engineering and Management

基　　金：西京学院科研基金(XJ170121)

摘　　要：土体物理与力学指标间通常具有相关性。基于大连某人工岛地基岩土勘察资料,分别采用单参数(天然含水率、初始孔隙比、重度)与多参数(天然含水率、初始孔隙比、重度、液限、塑性指数)法对压缩指数进行回归分析。基于回归分析结果,统计了上海、广州、江苏、连云港、温州等地黏性土天然含水率与压缩指数的相关性,并建立了二者的经验模型。研究结果表明:当采用单参数回归分析时,压缩指数与天然含水率的相关性较好、预测精度较高;当采用多参数回归分析时,压缩指数与初始孔隙比、干重度、液限组合时的预测精度最高。通过多地区土体压缩指数与天然含水率的相关性分析,得出二者相关系数达到了0.946,表明经验模型适用于上述地区土体压缩指数的近似计算。In general,the soil physical parameters are related to mechanical parameters. Based on geotechnical investigation data of Dalian artificial island,the regression analysis between compression index and physical parameters were undertaken which used one parameter（ natural water content,initial void ratio,unit weight） and multiple parameters（ natural water content,initial void ratio,unit weight,liquid limit,plasticity index） methods. Based on the analysis results,the empirical model between natural water content and compression index of clayey soils in Shanghai,Guangzhou,Jiangsu,Lianyungang and Wenzhou is established. The research results showed that,the correlation and precision between compression index and natural water content are better using one parameter method,and the precision between compression index and initial void ratio,unit weight,liquid limit is the best using multiple parameters method. According to the correlation analysis of clayey soils in multi areas,the association coefficiency between compression index and natural water content attained0.946,which indicated that the new model is suitable for approximate calculation of compression index in above areas.

关 键 词：黏性土 压缩指数 天然含水率 初始孔隙比 回归分析 

分 类 号：TU412[建筑科学—岩土工程]