ZHU Yan, GU Qian-yan, JIANG Jie, et al. Reliability analysis for overall stability of large-span double-row steel
sheet-piled dock cofferdam based on Bayesian method[J]. 2016, 37(S1): 609-615.
ZHU Yan, GU Qian-yan, JIANG Jie, et al. Reliability analysis for overall stability of large-span double-row steel
sheet-piled dock cofferdam based on Bayesian method[J]. 2016, 37(S1): 609-615.DOI: 10.16285/j.rsm.2016.S1.080.
There are large uncertainties in the overall stability of supporting structure of large-span double-row sheet-piled cofferdam. The projects with the same values of factor of safety may have different failure probabilities. It is found in practice that some projects with large factor of safety failed and vice versa. In order to improve the evaluation and reduce the uncertainties of stability analysis
Bayesian method is applied for reliability analysis. First
the prior probabilities of soil parameters are obtained based on statistic data. Then
the posterior probabilities are achieved by updating the prior with measured data based on Bayesian method. Finally
the method of “first order second moment” is applied to conduct reliability analysis of the supporting structure stability of deep excavation. Bayesian method theoretically solves the problem of integrating the information from both experience and measurements. The reliability analysis with Bayesian method may be closer to real cases.