非饱和土体渗流参数研究  

Research on Seepage Parameters of Unsaturated Soil

作　　者：周乐[1] 刘亚坤[1] 

机构地区：[1]大连理工大学水利工程学院,辽宁大连116024

出　　处：《水利与建筑工程学报》2014年第2期145-148,共4页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金"黄土沟坡重力侵蚀过程现场试验研究"(51179021)

摘　　要：土石坝渗流分析的重要任务之一为防止发生渗透破坏。以往的研究由于对非饱和土体渗流参数的理论研究不足,主要集中在对坝体饱和渗流的分析,不能真实反映土石坝渗流动态情况。采用土壤特性计算软件初步确定非饱和渗流参数。结合前人研究可靠的Fredlund数学模型和VG数学模型,运用1stOpt数据分析处理软件分别对土-水特征曲线及非饱和渗透系数曲线进行数据拟合及修正,结果表明:拟合相关系数满足精度要求,运用相应拟合结果进行非饱和土体渗流计算是合理可行的,其拟合结果可用于非饱和土的渗流计算。Preventing seepage failure is one of the important targets in earth-rock dam’s seepage analysis .Due to the lack of the theoretical research for the seepage parameters of unsaturated soil ,the previous studies have focused on the saturated seepage analysis of earth-rock dam ,which could really reflect the dynamic situation of earth-rock dam’s seep-age .In this paper ,the unsaturated seepage parameters are primarily determined based on the characteristics of soil by us -ing soil character calculation software .The 1stopt data analysis and processing software are used for the data fitting and revision of the soil-water characteristic curve and unsaturated permeability coefficient curve combining with Fredlund mathematical model and VG mathematical model .The results show that the fitting correlation coefficient could fulfil the requirement of accuracy ,so it is reasonable and feasible using the corresponding fitting results to do the calculation of un -saturated soil seepage ,and the fitting result could be used for unsaturated soil seepage calculation .

关 键 词：非饱和土 渗流参数 土 - 水特征曲线 数据拟合 

分 类 号：TV641[水利工程—水利水电工程]