基于SEM图像的软土接触面积定量研究

发布时间：2018-04-15 17:54

本文选题：SEM图像 + 接触面积率　；参考：《应用基础与工程科学学报》2016年02期

【摘要】：为了获取软土接触面积大小,对杭州紫金港软土进行了大量的SEM图像扫描,通过分析软土SEM图像的特点,建立三维空间计算模型,利用Image-ProPlus(IPP)软件统计软土的微观孔隙率,通过对比宏观孔隙率与微观孔隙率之间的关系,定量获取土体接触面积的百分比,首次提出了软土平均接触面积率的概念,分析了孔隙率获取中可能存在的误差.结果表明,土体接触面积并非很小,其值跟孔隙率有关,孔隙率越小接触面积率越大,本文试样中,当软土孔隙率为0.371时,接触面积率约10%,且采用宏微观孔隙率相等获取的接触面积率比采用阈值获取的要稳定,该方法提供了一条获取软土接触面积率的有效路径.
[Abstract]:In order to obtain the size of soft soil contact area, a large number of SEM images were scanned on soft soil in Zijin Port, Hangzhou. By analyzing the characteristics of soft soil SEM image, a three-dimensional spatial calculation model was established, and the microscopic porosity of soft soil was calculated by Image-ProPlus IPP) software.By comparing the relationship between macro porosity and micro porosity, the percentage of soil contact area is obtained quantitatively. The concept of average contact area ratio of soft soil is put forward for the first time, and the possible errors in obtaining porosity are analyzed.The results show that the contact area of soil is not very small, and its value is related to porosity. The smaller the porosity is, the greater the contact area ratio is. In this paper, when the porosity of soft soil is 0.371,The contact area ratio is about 10 and the contact area rate obtained by using macro and micro porosity is more stable than that obtained by threshold. This method provides an effective way to obtain contact area rate of soft soil.
【作者单位】：浙江大学滨海和城市岩土工程研究中心;浙江大学软弱土与环境土工教育部重点实验室;杭州武林广场地下商城建设有限公司;云南交通职业技术学院;
【基金】：国家自然科学基金资助项目(51178420) 国家科技支撑计划2012BAJ01B04-3
【分类号】：TU447

【参考文献】