为了获得K_0固结状态下的土样并测试其K_0值,利用模型槽测试系统制备了重塑K_0固结状态土样,以模型槽内固结土样为例,对其天然密度、含水率、重度等物理指标进行了测试分析,并采用经验公式法、K_0固结仪、三维土压力盒原位测试三种方法分别测试了土的静止侧压力系数K_0。结果表明,通过原位测试测得的K_0系数比较准确,其他两种方法均对土体有扰动而引起误差。另外,三维土压力盒测得的两个水平方向上的应力并不完全相同,由此表明两个水平方向尺寸对K_0值存在影响。 In order to obtain soil samples with K_0 consolidation status and test their K_0 value, the remodeled K_0 consolidated soil samples were prepared by using the model tank test system. Taking the solidified soil samples in the tank as an example, the natural density and water cut , Severe and other physical indexes were tested and analyzed. Three methods of empirical formula method, K_0 consolidation instrument and three-dimensional soil pressure box in-situ test were used to test the static lateral pressure coefficient K_0. The results show that the K_0 coefficient measured by the in situ test is more accurate, and the other two methods cause disturbance to the soil and cause errors. In addition, the stresses in the two horizontal directions measured by the three-dimensional earth pressure box are not exactly the same, indicating that the two horizontal dimensions have an impact on the K_0 value.