基于SEM图像信息的软土三维孔隙率定量分析  

Quantitative Analysis of Soft Clay Three-dimensional Porosity Based on SEM Image Information

作　　者：徐日庆[1,2] 邓祎文[1] 徐波 来剑平 詹学贵[4] 徐丽阳[1] 陆建阳[1] 

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [2]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058 [3]杭州武林广场地下商城建设有限公司,浙江杭州310058 [4]云南交通职业技术学院,云南昆明650101

出　　处：《地球科学与环境学报》2015年第3期104-110,共7页Journal of Earth Sciences and Environment

基　　金：国家自然科学基金项目(51178420);"十二五"国家科技支撑计划项目(2012BAJ01B04-3)

摘　　要：为了获取丰富的SEM图像信息并用于软土微观结构定量研究,对杭州地区紫金港软土进行了SEM图像扫描;定性描述了软土微观结构孔隙特征,建立了基于Image-pro Plus(IPP)图像分析软件的三维孔隙计算模型;基于微积分思想,统计了软土的三维孔隙率;分析了软土孔隙率数量和大小随阈值的变化趋势与三维计算模型可行性的联系,并讨论了二值化处理获取的平面孔隙率与本文提出的公式统计的三维孔隙率之间的关系。结果表明:本文提出的三维孔隙率计算公式是可行的,统计结果符合孔隙三维空间分布逻辑;较二值化处理获取的平面孔隙率,本文获取的三维孔隙率更加接近孔隙真实情况,求取方法思路清晰,为软土微观定量研究建立了一条新途径。In order to obtain SEM image information for soft clay microstructure quantitative research,a larger number of SEM images for soft clay in Zijingang of Hangzhou area were scanned;characteristics of soft clay microstructure porosity were described qualitatively,and three-dimensional porosity calculation model was built based on Image-pro Plus（IPP）software;according to calculus thought, three-dimensional porosity of soft clay was obtained; the connection between the feasibility of three-dimensional calculation model and the number and size of soft clay porosity changing with the threshold was studied;the relationship between plane porosity calculated by binarization processing and three-dimensional porosity obtained by three-dimensional calculation model was discussed.The results show that three-dimensional porosity calculation model is feasible,and statistical results conform to the logic of three-dimensional spatial distribution of pore;comparing with plane porosity calculated by binarization processing, the three-dimensional porosity obtained by three-dimensional calculation model is closer to the real situation; this method has a clear thinking and establishes a new approach for the quantitative research of microstructure of soft clay.

关 键 词：微观结构 软土 SEM图像 定量 三维孔隙率 平面孔隙率 计算模型 二值化处理 

分 类 号：TU411.92[建筑科学—岩土工程] P642.1[建筑科学—土工工程]