In order to solve the problem that the cable laying density in the utility tunnel or pipe trench is large,and the fire is easy to form a chain accident of the power system,the FDS simulation software was used to construct a dynamic risk assess-ment model of cable fire in the utility tunnel with comprehensively considering the different response of safety barriers such as sensors,spray system,ventilation systems and fire doors.The Arrhenius formula was used to map the indexes of numerical sim-ulation results into the risk value of cable fire,and then the time-varying risk curve of cable fire was drawn to explore the dy-namic risk assessment and emergency decision optimization scheme of the utility tunnel cable under the fire scenario.The re-sults show that the spray system is the most critical factor affecting the cable fire risk of utility tunnel,and the installation po-sition and action state of the spray system greatly affect the cable fire risk of utility tunnel.The research results can provide application value for the prevention,treatment and recovery of typical accidents of cable lines in underground utility tunnel.
维普
万方数据