南沙地区软土物理力学性质指标与微结构参数的统计分析  

Statistic Analysis of Physical-mechanical Indexes and Microstructure Parameters of Soft Soil in Nansha Area

作　　者：刘勇健[1] 李彰明[1] 伍四明[2] 吴加武[1] 

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006 [2]广东省建筑设计研究院,广东广州510010

出　　处：《广东工业大学学报》2010年第2期21-26,共6页Journal of Guangdong University of Technology

基　　金：广东省自然科学基金资助项目(6021462);广东省重点扶持学科基金;广东工业大学博士基金资助项目(09033)

摘　　要：通过土工试验获取了土的物性参数指标,通过电镜扫描测试技术和计算机图像处理技术获取了微结构参数.利用概率论数理统计方法对南沙地区软土宏观物理力学性质指标和微结构参数进行了分析,得出了土性参数经验公式;建立了软土的压缩系数、压缩模量、黏聚力、内摩擦角与微结构参数的4个多元回归方程式,给出了一些有益结论,可为软土工程可靠性分析和软基处理设计提供依据,为南沙软土区的工程建设提供一定参考.The physical-mechanical properties of soft soil are largely controlled by the internal microstructure,and the relationship between microstructure parameters and the engineering properties is essential for microstructure quantitative analysis.Microstructure maps and parameters of soft soil in Nansha area are got by adopting scanning electron microscope（SEM）and image processing technique.Based on the statistic analysis of physical-mechanical indexes and microstructure parameters of soft soil in Nansha region,the relationship between microstructure parameters and the engineering properties such as compression coefficient,compression modulus,cohesion,and internal friction angle is discussed,and a linear regression equation between microstructure parameters and macro-mechanical properties of soft clay is established.Some beneficial conclusions can act as important evidence for the reliability analysis of soft soil engineering and ground treatment design of soft soil,and guidance on the engineering construction of soft soil in Nansha area.

关 键 词：软土 微结构参数 物理力学性质指标 逐步多元回归分析 

分 类 号：TU411.2[建筑科学—岩土工程] TU411.9[建筑科学—土工工程]