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一、估算膨胀土地基变形的目的建筑物变形观测资料表明,膨胀土地基上建筑物的开裂破坏程度与上部荷载的大小及地基土胀缩变形幅度有直接关系。云南、广西地区实测的胀缩变形幅度为9～48毫米,平均24.5毫米,因此这两个地区建筑物开裂破坏较严重。实测变形幅度较小地区,如合肥,变形幅度为3.4～17.5毫米,平均为10.23毫米,建筑物的开裂破坏就较轻。
First, the purpose of estimating the deformation of the expansive foundation The deformation observation data of the building shows that the degree of cracking damage of the building on the expansive soil foundation has a direct relationship with the size of the upper load and the extent of deformation and deformation of the foundation soil. The measured expansion and contraction deformation range in Yunnan and Guangxi is 9-48 mm, with an average of 24.5 mm. Therefore, the buildings in these two regions have more severe cracking and destruction. In areas where the measured deformation is relatively small, such as Hefei, the deformation range is 3.4 to 17.5 mm with an average of 10.23 mm, and the cracking of the building is lighter.