我国属膨胀土分布较广的国家,而膨胀土含有较多粘土矿物,使膨胀土具有吸水膨胀,失水收缩,再吸水再膨胀这种反复胀缩的特性,并且在吸水膨胀后强度下降幅度较大。这使得膨胀土地区的道路桥梁遭受破坏性影响。为此,必须对膨胀土采取必要的工程处治措施。 China is a country with a wide distribution of expansive soils, while expansive soils contain more clay minerals, which make the expansive soils have the characteristics of repeated expansion and contraction, such as water absorption expansion, water loss contraction and water absorption re-expansion. Larger. This has the destructive impact on roads and bridges in expansive soil areas. For this reason, the necessary engineering measures must be taken for expansive soils.