水文地质工程地质2017，Vol.44Issue(6)：154-162,9.DOI:10.16030/j.cnki.issn.1000-3665.2017.06.23
马兰黄土渗气率与饱和渗透系数的关系研究
A study of the relationship between gas permeability and saturated coefficient of permeability of the Malan loess
摘要
Abstract
A series of gas and saturated penetration tests for the Malan loess are conducted by using the improved ZC-2015 air permeameter and TST-55 permeameter.We firstly determine the stable permeability diameter of the corresponding ka,and then explore the relationship between air permeability ka and saturation coefficient of permeability Kw.The research results show that ka not only describes the pore and structural characteristics of unsaturated soils,but also can be used to predict Kw.ka decreases with the increasing permeability diameter,and ultimately this trend becomes stabilized.The stable permeability of the undisturbed and remolded loess is 8 cm.There is a significant double-logarithmic linear relationship between ka and Kw,The correlation between lgka and lgKw of the remolded loess with different grain compositions and undisturbed loess in different depths are obvious,but the fitting formula between the undisturbed soil and the remolded soil is very different.In addition,when the content of clay particles is high,the slopeβ and intercept α of the remolded sample obviously increase.Under the different water content,the formula of the remolded soil is very different,when the water content,the change in ka is more than Kw with the increase of the dry density,and the slopeβ and the intercept α of fitting line are obviously reduce.关键词
渗气率/稳定渗径/饱和渗透系数/双对数线性关系/马兰黄土/黏粒含量Key words
gas permeability/stable permeability diameter/saturated permeability coefficient/double-logarithmic linear relationship/Malan loess/content of day particles分类
天文与地球科学引用本文复制引用
刘锦阳,李喜安,简涛,郭泽泽..马兰黄土渗气率与饱和渗透系数的关系研究[J].水文地质工程地质,2017,44(6):154-162,9.基金项目
国家自然科学基金资助项目(41572264,41172255,41440044) （41572264,41172255,41440044）
