To assess the risk of large-section rectangular pipe jacking tunnel under-crossing railway,a risk assessment system for the large-section rectangular pipe jacking project under-crossing railway was established by using the interpretive structural modeling approach.An improved dynamic Bayesian network(DBN)risk prediction model was developed,and the risk values of large-section rectangular pipe jacking project under-crossing railway were obtained by the fuzzy set theory and expert as-sessment method.The results show that the improved DBN model can achieve the advanced risk assessment,early deployment of risk control plans,dynamic assessment,and feedback of on-site construction risk for the large-section rectangular pipe jack-ing project under-crossing railway.The risk prediction results of the improved DBN model are consistent with the expert pre-diction results.The predicted risk values of finite element-DBN(FEM-DBN)model are slightly higher than those of on site monitoring-DBN(OSM-DBN)model,which can provide more safety reserves for crossing projects.The research re-sults can provide reference for risk control in the construction of large-section pipe jacking crossing railways.
关键词
隧道工程/风险评估/穿越工程/数值模拟/现场监测
Key words
tunnel project/risk assessment/crossing project/numerical simulation/on site monitoring
维普
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