基于SEM和IPP测定软黏土接触面积的试验  

Experimental study on soft clay contact area based on SEM and IPP

作　　者：徐日庆[1,2] 徐丽阳[1,2] 邓祎文[1,2] 朱亦弘 

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

出　　处：《浙江大学学报（工学版）》2015年第8期1417-1425,共9页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51178420);国家科技支撑计划资助项目(2012BAJ01B04)

摘　　要：为了研究软黏土的微观结构和宏观性质之间的关系,以浙大紫金港软黏土为研究对象,采用扫描电子显微镜(SEM)研究黏土微观结构,对微观结构进行定性分析,描述微观形貌特征.基于Image Pro-Plus软件对SEM图像作定量分析,提出基于实测孔隙率的灰度阈值分割方法处理图像技术,重点测定了接触面积,并得到孔隙面积比与孔隙率的定量关系.结果表明:浙大紫金港软黏土的微观结构是由霜叶状的土颗粒排列成类似蜂窝状结构;孔隙面积比和孔隙率之间存在幂函数关系.建立了微观和宏观之间的量化关系.In order to study soft clay microstructure and find the relation with soil macro-mechanical properties,ZJU-Zijingang clay was taken as an example in the paper.Microstructure characteristics of ZJU-Zijingang clay were observed using scanning electron microscope(SEM)and were quantitatively studied using Image Pro-Plus(IPP)software.The microstructure characteristics of soft clay were described.The Gray Threshold Partition Method was proposed according to soil porosity obtained in laboratory tests.The concact area and the porosity were mainly measured.Finally the relationship between the pore area ratio and the porosity was established.The results show that ZJU-Zijingang clay microstructure is honeycomb structure that consists of clay particles like winter withered leaves.There is a power function relationship between the pore area ratio and the porosity.The quantitative relation between micro and macro is established.

关 键 词：#微观结构 SEM IPP 孔隙率 接触面积 

分 类 号：TU411.92[建筑科学—岩土工程]