砂土管涌机理的细观试验研究  

Meso-experimental research on piping mechanism in sandy soils

作　　者：姚志雄 周健[2,3] 张刚 

机构地区：[1]福建省交通科学技术研究所,福州350002 [2]同济大学地下建筑与工程系,上海200092 [3]同济大学岩土及地下工程教育部重点实验室,上海200092 [4]现代建筑设计集团申元岩土工程有限公司,上海200011

出　　处：《岩土力学》2009年第6期1604-1610,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50379037)

摘　　要：利用显微摄像可视化跟踪技术、数字信息计算机实时处理技术,结合数字图像识别分析手段,对砂土管涌的整个过程进行跟踪记录,从细观角度揭示渗流过程中系统几何特性和水力特性的复杂变化。得到水头,水力梯度,颗粒位移场和孔隙率等量的动态变化过程,并对整个渗流过程中加压速率对管涌发展的影响,颗粒的运动特点,颗粒流失的分布特点以及渗漏通道的贯穿进行分析,揭示水土相互作用贯穿于管涌发展的全过程。Using micrographic visual tracing and digital information real-time processing techniques combined with digital image identification method, the piping process is traced and recorded. The complicated variations of hydraulic and geometric features are disclosed mesomechanically. The dynamic changes of pressure, hydraulic gradient, particles displacement field and porosity etc. are obtained; and the influence of pressure rate on piping, the moving characteristics of particles, the distribution of particle losses and the penetration of leakage passage are analyzed. The results indicate that water soil interaction exists during the whole process of piping.

关 键 词：显微摄像 细观 砂土 渗漏通道 水土相互作用 

分 类 号：TV698.233[水利工程—水利水电工程]