饱和-非饱和土渗流数值分析方法综述  

METHODS FOR NUMERICAL ANALYSIS OF SEEPAGE IN SATURATED-UNSATURATED SOILS

作　　者：王成华[1] 张燕青[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《建筑技术》2016年第5期428-432,共5页Architecture Technology

基　　金：国家自然科学基金资助项目(51178309)

摘　　要：饱和-非饱和渗流是岩土工程中最常见的问题之一,国内外针对这一问题进行了大量的数值分析研究。通过对饱和-非饱和渗流数值分析研究进行总结,从渗流分析模型与方法、非饱和土的渗透特性、初始条件以及非饱和土降雨入渗边界条件四个方面介绍了饱和-非饱和渗流数值分析的研究现状,讨论了现有分析方法存在的问题。在目前普遍考虑单相流的情况下,应该重视气相的影响;重视非饱和渗透特性的确定,研究数值拟合中各参数的合理取值,同时注重非饱和渗透特性的实验量测;为提高饱和-非饱和渗流数值分析的准确性,应该重视提出符合实际的初始孔压场,提出合理的边界条件。Saturated-unsaturated seepage is one of the most common problem in the geotechnical engineering. The researchers both in home and abroad have done numerous numerical analysis on this problem. The numerical analysis of seepage in saturated-unsaturated soils was summarized, the research status was presented and discussed in the following aspects： the seepage analysis models and methods, the permeability characteristics of unsaturated soil, the initial condition and the rainfall infiltration boundary condition of the unsaturated soil. It also discussed the problems of the numerical analysis methods. It was suggested that more attention should be paid to the impact of the air phase under the condition of the single-phase seepage was generally considered in saturated-unsaturated soils; more attention should be paid to the determination of the permeability characteristics of unsaturated soil, to the research of the reasonable value of the parameters in the numerical fitting and to the experimental measurement of the permeability characteristics; in order to improve the accuracy of numerical analysis of seepage in saturated- unsaturated soils,more attention should be paid to the determination of the accurate initial pore pressure and to propose the reasonable boundary condition.

关 键 词：饱和一非饱和渗流 渗透特性 初始条件 边界条件 数值分析 

分 类 号：TU411[建筑科学—岩土工程]