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现在世界上大多数工业发达国家,如美国、英国、西德、日本等国土的分类都采用统一分类法体系,即粗粒土按土的粒度和级配进行分类;细粒土按土的塑性指数和液限进行分类,也即采用美国卡萨格兰德(A.Casagrande)教授提出的塑性图分类法。近年来,我国也有同志研究和介绍统一分类法,原水电部已把国外的统一分类法经过修改后,列入1979年修订的《土工试验规程》SDS01-79(以下简称《规程》)内。这对统一我国土的分类无疑将起到推动作用。
Most of the industrialized countries in the world, such as the United States, the United Kingdom, West Germany, Japan, and other territories, have adopted a unified classification system, that is, coarse-grained soils are classified according to the granularity and grading of soils; fine-grained soils are classified according to the plasticity of soils. The index and the liquid limit are classified, that is, using the plastic map classification proposed by Professor A. Casagrande. In recent years, there are comrades in China who have studied and introduced a unified taxonomy, and the original Ministry of Water Resources has revised the unified foreign taxonomy into the 1987 revised “Soil Test Procedures” SDS01-79 (hereinafter referred to as the “Regulations”). This will undoubtedly play a catalytic role in unifying the classification of China’s land.