土的流限与塑限试验,在土木工程中占着相当重要的地位,它与土的物理性质,力学性质,水理性质,有着密切关系。设计人员往往以它的性质来估计建筑物的下沉,地基的承载力。道路与土坝工程中,常以它来控制最优含水量与最大干容量。此外在剪力、固结、渗透………等试验中,常以它来校核成果的可靠性,所以,流塑限试验,引起了土工人员的兴趣与注 The flow limit and plastic limit test of soil occupy a very important position in civil engineering. It has a close relationship with the physical properties, mechanical properties, and physical properties of soil. Designers often use its nature to estimate the subsidence of buildings and the bearing capacity of foundations. In road and earth dam projects, it is often used to control the optimal moisture content and maximum dry capacity. In addition, in tests such as shear, consolidation, infiltration, etc., it is often used to check the reliability of the results. Therefore, the flow plastic limit test has attracted the interest and attention of the geotechnical staff.