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在讨论孔压圆锥贯入试验的三种分类图之后,本文提出了一种新的分类图。由一个新参数Nh,来区分不同的软土(砂、粉土和粘土)分别位于新分类图上不同的部位。Nh可由圆锥阻力、孔隙压力及孔深加以确定。有了连续的Nh剖面,即可在现场进行土的分类。以三个荷兰实例说明新分类图是可行的,并由欧美国家24孔孔压圆锥贯入试验资料绘制了新分类图,图中各种土类分界线Nh值亦与荷兰土相同。最后,讨论了新分类图存在的某些局限性。
After discussing the three classification charts of the hole pressure cone penetration test, this paper proposes a new classification chart. A new parameter, Nh, distinguishes different soft soils (sand, silt, and clay) from different locations on the new classification map. Nh can be determined by cone resistance, pore pressure, and pore depth. With a continuous Nh profile, soil classification can be performed on site. It is feasible to illustrate the new classification map with three Dutch examples. A new classification map was drawn from 24-hole pore pressure cone penetration test data from European and American countries. The Nh values of various soil types in the map are also the same as those of Dutch soil. Finally, some limitations of the new classification map are discussed.