Analysis Of Water Infiltration And Calculation Of Moistening Deformation For Loess Subsoil

The subsoil settlement is one of the main research subjects in soil mechanics. Owing of the special structure of the loess, the moistening deformation of varying degrees is on show with the result of the pressure and water, causing a lot of project accidents. At present the subsoil is designed in Norm with the collapsible coefficient, which displays the saturated deformation of immersing and doesn't display the moistening deformation, relatively wrong compared with the fact, leading to the unnecessary waste and judging mistakes under some conditions. This text realizes the deficiency of research currently and thinks it necessary to study the moistening deformation.The moistening deformation is a additional deformation of increasing water content after it is steady under the pressure. The key to calculate the moistening deformation is to work out the distribution of the water content. Aiming to the collapsible accidents owing of leakage, this text establishs two-dimensional immersing model of collapsible loess and predicts the change of water content in loess subsoil. Furthermore the text selects the stress path method to calculate the moistening deformation subjected to leakage, substituting compressing moduls for tangent moduls after taking cavity ratio and water content into account, putting forward the method to calculate the moistening deformation.Use above-mentioned theory, analyze the project example of collapsible loess subsoil and validate it.