Method for determining unfrozen water content of unsaturated soil

• Main Authors: ZHU JISHUAI, ZHOU LIN, XU JIAN, ZHOU FENGXI, WAN XUSHENG, LU JIANGUO, ZHANG YU, LIU JIANKUN, YAN ZHONGRUI
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining unfrozen water content of unsaturated soil, relates to the field of unfrozen water content of soil, and establishes a relationship between water film thickness and temperature change in a gas-pre-melting layer-crystal system; establishing a relationship between water film thickness and temperature change between different solid material interfaces and between crystal boundaries of the same crystal in the matrix-pre-melting layer-crystal system; establishing a Gibbs free energy equation in an ice-water interface curvature induced melting process under an ice-water system; establishing a relationship between the curvature radius and the temperature change in the curvature-induced melting process by taking the chemical potential balance of the ice-water system as a judgment condition; establishing an unfrozen water content model of the unsaturated soil; a soil sample is collected, the soil particle size, the initial water content and the gas saturation are measure