基桩质量检测影响因素分析  

Analysis of Influence Factors on Quality Testing for Piles

作　　者：张树珺[1] 司马玉洲[1] 

机构地区：[1]南阳理工学院土木工程系,河南南阳473004

出　　处：《土木工程与管理学报》2011年第3期94-97,102,共5页Journal of Civil Engineering and Management

基　　金：河南省基础与前沿技术研究计划项目(102300410148)

摘　　要：基于概率统计知识,利用置信区间的概念,对抽检桩数进行了估计。本文通过控制待测桩样本合格率的置信区间长度,保证了检测结果的精度要求,推导出了待测桩数目的估计式。然后分析了公式中各因素对抽检桩数目的影响。另外,考虑到工程桩质量检测的过程中可能遇到的误检、误诊的问题,提出了验真概率和验伪概率的概念,从而使估计抽检桩数目的计算公式得到了修正。算例分析表明,因为误检、误诊的存在,为保证桩质量检测的精度,应增加抽检桩的数目。Based on the knowledge of the probability and statis ti cs,the paper estimates the number of piles for test using the concept of the co nfidence interval.Through controlling the length of the confidence interval,th e accuracy of the results of test is satisfied and the estimate formula of the n umber of piles for test is derived,then the influence of various factors of the formula on the number of piles for test is also analyzed.In addition,consider ing the reason of possible false drop and misdiagnosis during test of piles,the paper puts forward the concept of the probability of checking true and the prob ability of checking pseudo,which modifies the estimate formula of the number of piles for test.The results from case studies indicate that,due to false drop and misdiagnosis,the number of piles for test mentioned above should be increas ed,to guarantee the accuracy of the results of test.

关 键 词：基桩 置信区间 误诊 误检 

分 类 号：TU473.1[建筑科学—结构工程]