珠江口西岸滨海区软土属性分析  

Analysis of Soft Soil Properties in the Coastal Area of the West Bank of the Pearl River Estuary

作　　者：罗跃春 甘展孜 曾新雄 王宁伟 LUO Yuechun;GAN Zhanzi;ZENG Xinxiong;WANG Ningwei(Center for Geotechnical and Foundation Engineering Technology Research,Guangdong Zhuhai Engineering Investigation Institute,Zhuhai 519000;The First Geological Division,Guangdong Geological Bureau,Zhuhai 519000)

机构地区：[1]广东省珠海工程勘察院,广东省岩土基础工程技术研究中心,广东珠海519000 [2]广东省地质局第一地质大队,广东珠海519000

出　　处：《土工基础》2024年第2期239-242,共4页Soil Engineering and Foundation

基　　金：珠海市社会发展领域科技计划项目(ZH22036201210021PWC);珠海市创新创业团队项目(2120004000224)。

摘　　要：软土属性具有的地域差异和空间异构性,是地基处理和工程设计时务必重点考虑的,因此对其属性参数进行统计和分析具有重要的工程意义。通过对珠江口西岸滨海区勘察钻探资料甄选,选取了302个高质量钻孔数据和2500余份详实的土工试验数据,对软土属性数据分布进行了剖析,讨论了各属性随深度的变化规律,考察了各属性的相关性。研究表明:统计区内含水率平均值为41.5%,平均孔隙比为1.15,平均塑性指数为15.9,平均液性指数1.4,以上属性随深度增加而有所降低;平均粘聚力为15.2 kPa,平均内摩擦角为12.2°,平均压缩模量2.0 kPa,以上属性随深度增加而提高。各软土属性相关性可分为三个层次,其中含水率~孔隙比、含水率~液性指数、液性指数~孔隙比为强相关。压缩模量~含水率、粘聚力~塑性指数、塑性指数~内摩擦角、粘聚力~内摩擦角为弱相关,其他相互为不相关。Soft soil parameters are significant different at various regions and depths.These soil parameters are the important basis for the soil improvement and the engineering design.Therefore,the statistics and analysis of the soft soil parameters have important significance for the engineering projects.A total of 302 borehole information and 2500 detailed geotechnical test data of the coastal area on the west Bank of the Pearl River were collected.Based on this data,the distributions of soft soil parame-ters were analyzed.The relation of each parameter with depth is discussed,and the correlation among these parameters is also investigated.The results show that,the average moisture content is 41.5%,the average void ratio is 1.15,and the average plasticity index is 15.9.The above-mentioned parameters decrease with the increase of the depth.The average cohesion is 15.2 kPa and the average internal friction angle is 12.2°.These properties increase with the increase of the depth.The correlation of soft soil properties can be divided into three levels,water content-void ratio,water content-liquid index,liquid index-void ratio are strongly correlated.Compression modulus-water content,cohesion plasticity index-plasticity index,internal friction angle-cohesion internal friction angle are weakly correlated,and others are not correlated with each other.

关 键 词：珠江口西岸 软土属性 统计分布 相关性 

分 类 号：TU447[建筑科学—岩土工程]