摘要
黄土是一种第四纪的松散堆积物,内部存在着许多原生和次生的孔隙和裂隙,为水流进入土体内部提供了优势通道,形成优势入渗现象,这种水流运动方式称为优先流。优势入渗和优先流的存在是滑坡及其它黄土地质灾害发生的主要原因之一,所以对于优势入渗现象的研究是十分必要的。本文主要通过前人学者对黄土优势结构面分类的论述,提出对黄土优势通道的分类方法;对国内外学者优先流的分类及主要的研究方法进行探讨,分析其存在的优缺点;总结当下优先流主要的入渗模型及代表模型的主控方程特征。最后对现今优势入渗的研究不足及未来发展方向进行分析探讨。
Loess is a kind of Quaternary loose deposits.There are many primary and secondary pores and cracks in the loess,which provide preferential channels for water to enter the soil and form preferential infiltration phenomenon.This water movement mode is called preferential flow.The existence of preferential infiltration and preferential flow is one of the main causes of landslide and other loess geological disasters,so it is necessary to study the phenomenon of preferential infiltration.Based on the discussion of the classification of loess dominant structural planes by previous scholars,this paper puts forward the classification method of loess preferential channels,then discusses the preferential flow classification of domestic and foreign scholars and the main research methods,and analyzes their advantages and disadvantages.This paper summarizes the main infiltration models of the current preferential flow and the characteristics of the governing equations representing the models,analyzes and discusses the deficiency of present research and the development direction in the future at the end.
作者
孙恒飞
朱兴华
成玉祥
张智锋
张卜平
蔡佳乐
SUN Hengfei;ZHU Xinghua;CHENG Yuxiang;ZHANG Zhifeng;ZHANG Buping;CAI Jiale(School of Geological Engineering and Surveying,Chang’an University,Xi’an 710054,China;Key Laboratory of Western Mineral Resources and Geological Engineering,Ministry of Education,Xi’an 710054,China)
出处
《自然灾害学报》
CSCD
北大核心
2021年第6期1-12,共12页
Journal of Natural Disasters
基金
国家自然科学基金重大项目(41790441,42090053)
国家自然科学基金重大专项项目(42041006)
国家自然科学基金面上项目(41877249)。
关键词
优先流
优势通道
入渗模型
数值模拟
研究综述
preferential flow
preferential passage
infiltration model
numerical simulation
research summary
