不同成因软土工程地质特性研究——以连云港、南京、吴江、盱眙等地四种典型软土为例  

Engineering Geological Properties of Different Sedimentary Types of Soft soils in Eastern China——Take the 4 Typical Types of Soft Soil in Lianyungang,Nanjing,Wujiang and Xuyi Area as Examples

作　　者：阎长虹[1,2] 吴焕然[1] 许宝田[1] 许崧[3] 郑军 燕晓莹[2] 

机构地区：[1]南京大学地球科学与工程学院,南京210046 [2]南京大学金陵学院,南京210089 [3]江苏省电力设计院,南京211102 [4]南京地铁集团有限公司,南京210008

出　　处：《地质论评》2015年第3期561-569,共9页Geological Review

基　　金：教育部博士点基金项目(编号20130091110020);江苏科技厅社会发展支撑项目(编号BE2011772)的成果

摘　　要：我国东部沿海和长江下游地区,地势低洼,分布广泛有第四系全新统新近沉积的软土,成因类型有滨海相、河漫滩相、湖沼相及间洼地相等软土。该地区软土厚度大、结构松散、高孔隙比,高含水量;其强度低、压缩性大,易产生流动变形。本文以这些不同成因类型的软土为例,针对其矿物成分、粒度成分、物理力学性质及其相关指标之间的关系进行了试验研究和系统分析。研究结果表明软土的成因类型及矿物成分、粒度成分、含水量控制着软土的工程地质性质。In the coastal areas,especially the lower Yangtze region of East—South China,the soft soils of the Holocene are widely spread. These soft soils are of littoral facies,floodplain facies, lacustrine facies, and intermountain-depression facies,et al. The soft soils in this region,which are of loose structure,high void ratio,and great water content,have poor engineering properties,such as low shear strength,high compressibility and fluidity. These facies soft soil had been taken as examples to study mineral compositions,grain size ranges,physical and mechanical properties of these soft soils and the relations between the indexes of physical and mechanical properties. The results show that engineering behaviors of soft soil are determined by sedimentary facies,mineral composition,grain size ranges and water content.

关 键 词：软土 成因类型 东南沿海地区 工程性质 江苏 

分 类 号：P642.133[天文地球—工程地质学]