Based on the statistic and analysis of the dimension deviation of cast-insitu concrete in Beijing,the data is ortho-state distribution and biases toward positive direction.

• 通过对近年北京地区现浇混凝土结构尺寸偏差的调查及统计分析,得出尺寸偏差呈正态分布,并明显地倾向于正偏差方向。