| In recent years, with the rapid development of air transport and high-speed rail, the comprehensive transport capacity of multi transportation has continuously improved. The demand for air transport is in the rapid growth period, however, the quantity of existing airport is few, the radiation range is not wide enough, and it is difficult to meet the needs of social development, so it is imminent to increase the airport quantity and expand the coverage of the airport passenger area radiation. In this paper, on the basis of the existing researches, it analyses the land side of the airport passenger flow characteristics, the definition of airport passenger radiation zone, multi airport regional airport location selected under given transportation network, the expansion strategies of airport passenger radiation zone and so on, In order to provide a theoretical basis and reference value for the new airport location selected and expanding the airport passenger radiation zone.This paper firstly analyzes the characteristics of airport landside traffic. The primary of airport landside passenger flow is aviation passenger. Airport landside traffic access modes can be divided into two main categories:road traffic and rail transportation. Landside traffic passenger flow has such obvious characteristics such as aggregation, transient, persistent, significant imbalance, relevant and so on.Secondly, it studies the definition methods of the airport passenger flow radiation area. It puts forward three kinds of ideal airport passenger flow radiation zone; and analyses the factors which affect the size of airport passenger flow radiation zone, that is, the scale of city and regional economic level, the size and nature of the airport, airport operation efficiency as well as the airport landside shuttle traffic; establishing the definition model of the airport passenger flow radiation zone, respectively based on the landside traffic distance and the demand of two city travel; then, puts Hefei airport as an example, analyzing the concrete solving process of airport passenger flow radiation zone.Then, this paper studies the site methods of multi-regional airport under the established traffic network. On the basis of analyzing traffic network and the new airport site influenced factors of multi airport area under high-speed rail competition, it uses a double-layer programming model to study the site methods of multi-regional airport under the established traffic network. Based on the passenger travel demand distribution, construct upper programming model by making airport construction costs which obtained from airport site selection and the total generalized ravel cost of regional passenger flow by all modes of transport travel lowest; and construct lower programming model of the user equilibrium traffic demand distribution through making the final generalized travel cost the same; then it uses an analysis of examples to verify the effectiveness of the site methods of multi-regional airport under the established traffic network.Next, this paper presents three strategies of extended airport passenger flow radiation zone, it is to enhance the accessibility of airport, to plan and construct remote terminal, and to develop air rail transport.Finally, this paper summarizes the main research finding, it can provide a theoretical reference for the new airport location selected and the expansion of airport passenger radiation area, and outlook the direction of further study, to do this work furtherer. |