A Method of Obtaining SWCC Based on Conventional Geotechnical Test
Liu Xiao-Wen, Wang Meng-Jia, Xu Fan, Wang Wendong, Ye Yun-Xue
Nanchang University, Nanchang, China
Keywords: Drying shrinkage test, triaxial test, pressure plate test, theoretical analysis, SWCC
Abstract
Soil-water characteristic curves (SWCC) are extremely important in solving practical engineering problems. Most of SWCC are measured based on the specimen in equilibrium, which has long test time, high specialization of test equipment and complicated test operation steps. Moreover, based on the existing equipment technical conditions, the determination of SWCC in the process of dehumidification and moisture absorption requires a variety of tests. Taking Jiangxi laterite, granite residual soil and expansive soil as the research object, SWCC based on the conventional geotechnical test is obtained. SWCC of dehumidification under no vertical load and vertical load and the soil water characteristic curves of dehumidification and moisture absorption are studied by conventional geotechnical tests. Compared with SWCC measured by geo experts pressure plate instrument, SWCC measured based on conventional geotechnical test is very close to that measured by pressure plate instrument.
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