Device and method for testing unsaturated permeability coefficient in full suction range

• Main Authors: QI SHENGWEN, ZHANG YAGUO, LI HUA, LI TONGLU, WANG YU, HOU XIAOKUN, LI YAN
• Format: Patent
• Language: Chinese; English
• Published: 18.08.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to the technical field of unsaturated soil permeability testing, in particular to a testing device and method for an unsaturated permeability coefficient in a full suction range, and aims to solve the problems that an existing unsaturated permeability coefficient testing device cannot be used for measuring the unsaturated permeability coefficient in the full suction range and is high in measuring cost and poor in precision. The testing device provided by the invention comprises a constant temperature and humidity chamber, a water supply system, a soil column system, a first balance and a second balance, the water supply system comprises an air compressor and a sealed container and is used for providing stable water flow for the soil column system; the air compressor is communicated with the sealed container and is used for providing compressed air for the sealed container; the soil column system comprises at least six stacked standard cutting ring samples, and test filter paper is arrang