非饱和土坡中平均有效饱和度分布模拟  

Simulation of average effective saturation distribution in unsaturated soil slope

作　　者：许长辉[1] 孙树林[1] 李方[1,2] 张德恒[1,3] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100 [2]南京工程高等职业学校,江苏南京210035 [3]南京工程学院建筑学院,江苏南京211167

出　　处：《河北工程大学学报（自然科学版）》2016年第4期17-21,共5页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：河海大学国家重点实验室开放研究基金项目(2005408911);留学回国人员科研基金资助项目(20071108)

摘　　要：由于直接测定土水特征曲线存在成本高、繁杂、费时等缺点,采用经验公式法预测土水特征曲线越来越受到重视。在非饱和多孔介质中,流体的运动特征主要表现为流体进入和填充孔隙过程中,水的传输和存储量的变化。可以运用COMSOL Multiphysics软件中的Richard方程接口,解决二维非饱和流问题。用该软件模拟非饱和土中的平均有效饱和度分布,预测土坡内和传感器周围的平均有效饱和度,并与实际情况进行对比分析,其结果具有一定的工程实践研究意义。The comman methods to directly determinate the soil water characteristic curve have the shortcomings of high cost, complicated and time - consuming. So the empirical formula method to predict soil water characteristic curve is more and more accounted. The main movement characteristics of？ fluid are the changes of water transport and storage in the process of entering and filling the pore in unsaturated porous media. This problem can be soled by using Richard equation in COMSOL Mul-tiphysics. The distribution of unsaturated soil average effective saturation was simulated and the aver-age effective saturation in the soil and around sensor was forecasted. The simulation is compared with the actual situation and the results have practical significance.

关 键 词：土-水特征曲线 Richrad方程 平均有效饱和度 

分 类 号：TU43[建筑科学—岩土工程]