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膨胀土是指土的粘土矿物成分中富含强亲水性粘土矿物,具有显著的吸水膨胀软化和失水收缩硬裂的高塑性粘土。我国是世界上膨胀土分布面积最广的国家之一,现已发现有膨胀土发育的地区达20余个省、市、自治区,分布十分广泛。
Expansive soil refers to the soil clay mineral composition rich in strong hydrophilic clay minerals, with significant swelling and softening water loss and shrinkage hard crack high plastic clay. China is one of the countries with the most widely distributed expansive soils in the world. It has been found that there are over 20 provinces, municipalities and autonomous regions with expansive soils, which are widely distributed.