钻芯法检测混凝土强度的一种建议:多次横向劈拉法  

One suggestion on the core drilling method of concrete testing:several times of transverse cutting

作　　者：余江滔[1] 蒋杰[1] 陆洲导[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《四川建筑科学研究》2010年第1期84-87,共4页Sichuan Building Science

基　　金：国家自然科学基金项目(50578126)

摘　　要：总结了钻芯法检测混凝土强度的局限性,基于钻芯法提出了芯样的多次横向劈拉,并从置信区间推算精度,置信区间上、下限的差值,变差系数上限三个方面分析了增加抽样数量可以提高检测精度,缩小置信区间差值,减小变差系数的上限,以满足规范要求的优点,从理论上证明多次横向劈拉法的合理性。This paper sums up the limitations of the core drilling method. Basing on this method , it presents the several times of transverse cutting on the concrete cylinder. Increasing the number of sampling has many advantages, such as increasing the accuracy of testing, reducing the difference of confidence interval and the coefficient of variation, which meet the code requirements. These three aspects prove that it is reasonable to use the several times of transverse cutting.

关 键 词：钻芯法 多次横向劈拉 置信区间 变差系数 抽样数量 

分 类 号：TU528.1[建筑科学—建筑技术科学]