为了弄清膨胀土地基上建筑物的变形规律,查明建筑物开裂损坏的原因以及解决膨胀土地基设计等问题。我们先后在7个省12个地区,对膨胀土地基上167栋有代表性的不同结构类型的建筑物(包括新建的试验性建筑25栋),进行了垂直变形、水平位移、基础转动、侧向压力、墙体裂缝等多项观测工作,同时相应地开展了室内外不同深度的 In order to clarify the deformation regularity of buildings on an expansive soil foundation, the causes of the cracking of buildings and the solution to the design of expansive soil foundations were investigated. We successively performed vertical deformation, horizontal displacement, basic rotation, and lateral transformation of 167 representative buildings of different types of structures (including 25 newly-built experimental buildings) on 12 sites in 7 provinces. A number of observations such as stress and wall cracks were conducted, and correspondingly, indoor and outdoor depths were developed.