Journal of Central South University

, Volume 21, Issue 3, pp 1148–1157 | Cite as

Dynamic estimation and reliability control of quality assurance for bored piles

  • Wen-yi Zhao (赵文艺)
  • Zhi-jun Xu (徐志军)
  • Jun-jie Zheng (郑俊杰)
  • Xiao-ya Bian (边晓亚)
Article
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Accepted:
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Abstract

A systematic method was proposed to estimate the occurrence probability of defective piles (OPDP) from a site according to quality assurance inspection. The OPDP was firstly suggested as the criterion to weight the performance of a pile foundation. Its prior distribution and updating distribution were deduced to follow Beta distributions. To calibrate the OPDP, a dynamic estimation model was established according to the relationships between prior mean and variance and updating mean and variance. Finally, a reliability-control method dealing with uncertainties arising from quality assurance inspection was formalized to judge whether all the bored piles from a site can be accepted. It is exemplified that the OPDP can be substantially improved when more definite prior information and sampling formation become available. For the example studied herein, the Bayesian estimator of updating variance for OPDP is reduced from 0.0037 to 0.0014 for the first inspection, from 0.0014 to 0.0009 for the second inspection, and with less uncertainty by incorporating experience information.

Key words

bored piles quality assurance inspection reliability control occurrence probability Bayesian method 
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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Wen-yi Zhao (赵文艺)
    • 1
  • Zhi-jun Xu (徐志军)
    • 2
  • Jun-jie Zheng (郑俊杰)
    • 1
  • Xiao-ya Bian (边晓亚)
    • 1
  1. 1.School of Civil Engineering & MechanicsHuazhong University of Science and TechnologyWuhanChina
  2. 2.School of Civil Engineering and ArchitectureHenan University of TechnologyZhengzhouChina

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