Open AccessExperimental study on water transfer of remolded loess under freezing
Author(s) -
Zhongxiang Liu,
Zhou Qiu-juan,
Wanjun Ye,
Zhao ZhiPeng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/510/4/042017
Subject(s) - water content , loess , front (military) , moisture , field capacity , water transfer , soil water , soil science , environmental science , geotechnical engineering , geology , materials science , composite material , geomorphology , oceanography , water resource management
The change of the internal moisture field of the loess is an important factor for the study of the cause of the loess engineering disease, and the freezing effect has a certain effect on the change of the internal moisture field of the loess. In order to analyze the law and mechanism of water distribution in the loess under four different factors, the indoor experiments of water transfer were carried out under different temperature gradients and different temperature levels. The results show that:Under the action of freezing, the greater the temperature gradient applied on both ends of the soil sample, the farther away from the top of the steady-state freezing front, the lower the water content increment in the early stage, and the higher the water content increment in the later stage, and the more obvious the change of water content near the steady-state freezing front, the greater the total amount of water migration; For the soil samples with higher dry density, the closer the frozen front is to the top, the increase of water content in the early stage is decreasing, and that in the later stage is increasing; With the increase of the initial moisture content, the water transfer of the soil sample increases, and the position of the steady-state freezing front of the soil sample with different initial moisture content is basically the same; At different temperature levels, the lower the cold plate temperature is, the farther the frozen front is from the top. When the cold plate temperature is in a certain range, the water transfer phenomenon is significant.