Study On The Distribution Of Waiting Passengers And The Optimization Based On The Facilities’ Layout Of Subway Platform

With the scale of subway network expanding gradually and the passenger volume of subway system keeping increasing,many stations are suffering the heavy pressure from passenger gathering and distributing in peak hours of workdays.Subway platform is the important space for passengers waiting for trains.During the peak hours,many passengers gathering in some waiting positions,howerver,a few passengers gathering in some other waiting positions.And the distribution of waiting passengers shows disequilibrium.The disequilibrium indicates the using of platfonn space for waiting passengers is insufficiency.While many passengers gathering in some waiting positions will cause the time of passengers boarding and alighting increasing,the train’s dewll time and turnaround time increasing further which easily leads to train delay.Moreover,the disequilibrium can cause the situation that some carriages of the train have a few passengers,low load rate and the transport capacity is wasted.Therefore,it’s meanful to study on the features of waiting passengers’ distribution,analyze its factors the effect of facilities on the distribution,put forward measures to raise the equilibrium of waiting passengers’ distribution and optimize the distribution.This paper firstly classifies the platform and investgate the platforms.Analyze the features of waiting passengers’ distribution on the platform and its factors which mainly include passengers,relative walking distance,the number of queuing passengers of waiting positions and the saturation of waiting positions,the volume of arriving passengers on the platform,the number of train formation and how familiar the passengers to the platform.Secondly,the paper analyze the relationship between the distribution of waiting passengers and the facilities of platform.The layout of facilities is the external environment for the distribution of waiting passengers forming and change of facilities will bring the distribution changes.The method of calculating equilibrium degree of distribution is proposed.Based on the invesitgated datas,the relationship between the equilibrium degree of distribution and the facilities is analyzed and the funcitions are fitted.The equilibrium degree can be a basis to take volume-limiting measures.Further,the measures to rasie the equilibrium degree of distribution are proposed.Thirdly,the function of waiting position selection is established based on the factors of passengers’ relative walking distance,the number of queuing passengers of waiting positions and the saturation of waiting positions.The distribution of waiting passengers optimization model is built which take the target of the equilibrium degree achieving best.Through improving accuracy gradually and searching the optimum solution in the feasible solutions,the parameters of model can bu calculated.At last,combined with a case and based on the layout of facilities and the datas of waiting passengers’ distribution of the case platform,the distribution of waiting passengers optimization model is applied.The facilities’ settings are calculated when the equilibrium degree achieving best.The functions are fitted about the relationship between the equilibrium degree and the dimensions of facilities.The results can provide theoretical basis for the design and reform of the facilities.Then taking reasonable settings of facilities as optimization measure,the distributions of waiting passengers are simulated before and after taking measure by using Anylogiv software and the benefits that the raising of equilibrium degree brings are also analyzed.