Risk assessment of large-section rectangular pipe jacking project crossing railway based on improved DBN
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.
tunnel projectrisk assessmentcrossing projectnumerical simulationon site monitoring
万方数据
维普
