1 问题的提出中华人民共和国国家标准《土的分类标准》(GBJ145-90)中,对细粒土的分类并列了两张塑性图,图2·0·4-1(简称图1)用于取质量为76g、锥角30°的液限仪入土深度为17mm 对应的含水量为液限时;图2·0·4-2(简称图2)用于取质量为76g、锥角30°的液限仪 1 PROBLEM PROBLEMS In the National Standard for Classification of Soils (GBJ145-90) of the People’s Republic of China, two plastic charts are listed parallel to the classification of fine-grained soils. Figure 2.0-4-1 (Figure 1 for short) Take the mass of 76g, the cone angle of 30 ° into the soil depth of 17mm corresponding to the water content of the liquid limit; Figure 2.0 · 4-2 (Figure 2) for the quality of 76g, the cone angle of 30 ° Liquid limiter