一、前言砂类土用作建筑物地基,一般不考虑完工后的地基变形,但对于下述情况,砂地基的变形是不能忽略的,即: 预估建筑物在施工期间的地基变形值,以便预留有关部分之间的净空和考虑施工方法及顺序; 地基承载力满足不了基底压力的要求,需要通过变形验算予以提高或调整; 砂的密度小,或基底下有性质不同的其它地层,需要用变形计算来确定处理措施或方案; 高耸和高层建筑物,需验证倾斜和横向倾斜者。因此,有的工程就需要提供砂土的E_0值。而有时由于试验或其它条件所限,给不 I. INTRODUCTION Sandy soils are used as foundations for buildings and generally do not take into account post-completion foundation deformation. However, for the following cases, the deformation of sand foundations cannot be ignored, ie, the estimated value of foundation deformation during the construction of buildings. In order to reserve the headroom between the relevant parts and consider the construction method and sequence; the foundation bearing capacity cannot meet the requirements of the base pressure, and it needs to be improved or adjusted by checking the deformation; the density of the sand is small, or there are other layers with different properties under the basement, Deformation calculations are needed to determine the treatment or plan; tall and high-rise buildings are required to verify tilt and lateral tilt. Therefore, some projects need to provide E 0 value of sand. And sometimes due to trial or other conditions, give