Research On The Optimizing Model Of Emergency Facility Location Of Urban Rail Transit Based On The Development Of Network

With the rapid development of urban rail transit in our big cities, urban rail transit mileage is rapidly rising. Sometimes various emergencies happen, which have a larger impact to operation safety. After the incident occurred, it is the key that effective emergency management and rescue minimizes its impact. After the urban rail transit network is completed, it should focus on an important problem optimal allocation of first-aid facilities and equipment from the overall network to ensure emergency aid efficiency and effectiveness.Urban rail transit network are divided planning network, developing network and mature network in this paper. Combined with incidents of urban rail transit fundamental characteristics and emergency facility location constraints, we established optimal location models of emergency facility based on network development as follows:1 Analyzing the basic characteristics of urban rail transit incidents:uncertainty, chain, secondary disaster more, big rescue difficulty and the destruction, we summary out requirements of urban rail transit network emergency facility location: the rescue time is limited, the full network is covered, emergency facility usually is located on urban rail transit station, some nodes must be regarded as emergency facility, the existing emergency facilities could be transformed with new line building;2. We establish the urban rail transit emergency facility location optimization models:(1) The developing network location model is built. The target is to minimize the sum of the new emergency facilities construction cost and the existing emergency facilities transformation cost. The constraint conditions are that the rescue time is limited, existing emergency facilities and "key nodes" are regarded as the required points and the existing emergency type could be changed;(2) The planning (mature) line new location model is built. The goal is to minimize the new emergency facilities construction cost. The constraint conditions are that the rescue time is limited and "key nodes" are regarded as the required points;(3) The planning (mature) line location increased model is built. The target is to minimize the new emergency facilities construction cost. The constraint conditions are that the rescue time is limited, existing emergency facilities and "key nodes" are regarded as the required points.3.We discuss the solving methods of our models. The calculation programs are compiled. And simulated annealing algorithm to solve the optimization models is determined.We established optimal location models of emergency facility based on network development which enriches the location theory and provide reference and instruction for urban rail transit planning, construction and operation.