Influence of Freeze-thaw Cycles on Water Content Properties of Silty Clay in Xuchang

Silty clay is the main structural stratum in Xuchang area. Based on the freeze-thaw cycle test, the influence of freeze-thaw on the water content and void ratio of silty clay is analyzed. The test results show that in the case of no recharge water source, the freeze-thaw cycle will cause water migration in the soil body, which will produce local high water content zone on the surface, and cause water loss and water content reduction, which is easy to cause soil loss Water shrinkage produces cracks. The results show that the higher the initial water content is, the faster the water content will be lost, and the different initial water content will tend to be the same when the freeze-thaw cycle reaches more than 15 times. With the increase of freeze-thaw times (5 times), the void ratio tends to be stable. The change of soil properties caused by water migration under freeze-thaw cycle plays an important role in soil stability control. The research results of this paper are helpful to carry out scientific and reasonable engineering prevention measures and provide basic data.