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1.大厚度湿陷性黄土分布我国的湿陷性黄土分布很广,约占世界黄土分布总面积的4.9%,大厚度湿陷性黄土受各地区堆积环境、地理位置、地质和气候条件的影响,其堆积厚度、土的工程特性(如湿陷性等)都有明显的差异。根据《湿陷性黄土地区建筑规范》GB50025-2004附录A中的中国湿陷性黄土分区图,我国的大厚度湿陷性黄土主要分布在I-陇西地区和II-陇东陕北晋西地区;Ⅲ一关中地区、IV一山西冀北地区以及河南(豫西)地区的高阶地上也有大面积分布。从地貌上看,主要分布于黄士塬、梁、峁及河流高阶地区,其厚度10～50m不等。
1. Large thickness of collapsible loess distribution China's collapsible loess is widely distributed, accounting for about 4.9% of the total loess area of the world, large thickness of collapsible loess by the accumulation of the environment, geographical location, geological and climatic conditions Impact, the accumulation of thickness, soil engineering characteristics (such as collapsibility, etc.) have significant differences. According to the Chinese collapsible loess zoning map in Appendix A of Building Code for Collapsible Loess Area GB50025-2004, the large-thickness collapsible loess in China is mainly distributed in the I-Longxi area and the II-Longdong Shanxi-Shanxi area ; Ⅲ a Guanzhong area, IV a Shanxi-Hebei region and Henan (West) area of high-level ground also has a large area distribution. Geomorphically, they are mainly distributed in the Huangshi Highland, Liangshan River and high-grade rivers and rivers, with thicknesses ranging from 10 to 50m.