Test of water migration of remolded loess under temperature variation

Due to the difference of the environment, the uneven distribution of water fields will occur in the soil. In order to explore the effect of different factors on the water migration of remolded loess, laboratory tests of the water migration of remolded loess, considering dry density and initial water content for the effects of different temperature gradients and temperature levels, were carried out. The change law of moisture fields of remolded loess was analyzed. The conclusions show that the greater the temperature gradient, the faster the water migration rate is. Temperature potential is the main factor in the change of water migration. The greater the dry density of soil samples, the greater matric potential, and the smaller the permeability coefficient is, causing the slower migration rate. When the water content of soil samples is larger, the permeability coefficient is smaller and the migration rate is smaller. When the initial water content is smaller, the total soil water potential is smaller, and the migration rate is smaller. When the initial water content is in a certain range, the migration rate is faster. The lower of the temperature level, the greater of the total soil water potential, the faster of the water transport rate is.