国标《土的工程分类标准》1989年4月26日至28日在北京召开了审查会,会议由水利部标准化技术委员会主持,建设、水利、交通、铁道、地矿、冶金等有关部门及高校的专家教授共32人参加会议。土的工程分类标准包括:总则;一般规定;巨粒土分类;粗粒土分类(即粗粒土,砾类土,砂类土);细粒土分类(即细粒土,含粗粒组和/或巨粒组的细粒土,有机质土、黄土、膨胀土和红粘土);土的简易鉴别、分类和描述;土的图示法等七个章节。该标准具有以下特点:1.主要按粒径和级配划分粗粒土,按塑性图划分细粒土,考虑有机质含量的分类总体系符合当前的科学技术水平,也与国际上多数主要国家的标准可类比;2.标准是土的普 National standard “Soil Engineering Classification Standards” April 26, 1989 to 28 April held a review meeting in Beijing, the meeting was chaired by the Ministry of Water Resources Standardization Technical Committee, construction, water conservancy, transportation, railway, mining, metallurgy and other relevant departments and universities A total of 32 experts and professors attended the meeting. Soil engineering classification criteria include: general provisions; general provisions; grainy soil classification; coarse grained soil classification (ie, coarse gravel soil, gravel soil, sand soil); fine grained soil classification (ie, And / or giant group of fine grained soil, organic soil, loess, expansive soil and red clay); simple identification, classification and description of soil; The standard has the following characteristics: 1. The classification of coarse grained soil mainly by particle size and grading, the classification of fine grained soil by plasticity diagram, considering that the total classification of organic matter content conforms to the current level of science and technology as well as with most major countries in the world Standard can be analogy; 2 standard is the soil of Pu