现浇混凝土结构尺寸偏差的调查统计分析  

The Statistic and Analysis of the Dimension Deviation of Cast-in-situ Concrete

作　　者：刘柯[1] 王有宗[1] 刘刚[2] 徐有邻[2] 

机构地区：[1]北京市建筑工程研究院,北京100039 [2]中国建筑科学研究院,北京100013

出　　处：《施工技术》2008年第1期98-100,共3页Construction Technology

摘　　要：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。尺寸偏差的形成与支模形式、混凝土拌合物质量以及施工(浇筑、振捣)的干扰有关。针对混凝土结构施工方式的变化,目前应重点控制梁的模板刚度以及楼板的负弯矩钢筋移位。还分析了我国施工验收规范中尺寸偏差允许值的适用性,并提出了改进建议。Based on the statistic and analysis of the dimension deviation of cast-in-situ concrete in Beijing, the data is ortho-state distribution and biases toward positive direction. The deviation of dimension is caused by the state of form brace, the quality of concrete mix, the disturbing to the form and reinforcement during construction. The rigidity of the horizontal members like beam form and the position of the negative reinforcement in the floor should be controlled. The application of the provision about the dimension deviation in the code for acceptance of constructional quality of concrete structures is analyzed in this article.

关 键 词：混凝土工程 尺寸偏差 正态分布 验收指标 

分 类 号：TU712.5[建筑科学—建筑技术科学]