| The demand for airport construction in China has increased dramatically in recent years.As far as the current ramp construction is concerned,U-shaped aprons are favored by new airports because of their small construction capital,low land resource ratio and high ratio of near-aircraft slots.However,U-shaped apron also has problems such as unreasonable layout of aircraft space,long time for inbound and outbound aircraft to occupy the taxiway and low taxiing efficiency.BIM technology can not only create U-shaped apron layout model,but also has experimental functions such as area measurement and dynamic simulation,which can play a supporting role in U-shaped apron layout analysis.Therefore,this paper uses BIM technology to analyze and evaluate the U-shaped apron layout from both static and dynamic perspectives,and finally arrive at the optimal layout plan for different layout modes of Ushaped aprons.The main research contents of the paper include the following aspects:(1)Relying on BIM 3D visual modeling technology to construct a parametric model of each element in the U-shaped apron,a new U-shaped apron model is generated by loading all families into the project browser and stitching all families together.A highly flexible parametric U-shaped apron model test platform is realized.(2)Using the BIM area measurement function,the BIM model of U-shaped apron in different layout modes is arranged,and then the area of each apron and the area of the parking area of the U-shaped apron model are measured to calculate the space occupancy rate of the apron under different combinations of aircraft types in different layout modes.Finally,the space occupancy ratio of various types of aircraft under different layout modes is compared,and the most suitable aircraft type ratio for different layout modes under static conditions is obtained.(3)The dynamic simulation function in BIM technology is used to simulate the arrival and departure of aircraft during peak hours under different layout modes of U-shaped apron,and the data of each plan under different layout modes are compared and summarized to arrive at the most suitable U-shaped apron width and depth ratios under different layout modes under dynamic conditions.At the same time,BIM technology is used to measure the taxiing time occupancy of U-ramp under different ramp layouts from the dynamic point of view,and combined with the ratios of ramp types under static conditions,the optimal ramp layouts under different U-ramp layouts are derived.(4)BIM model construction of three-pass U-ramp at Hangzhou Xiaoshan Airport.The space occupancy rate of Hangzhou Xiaoshan Airport three-channel U-ramp is measured and analyzed from a static perspective using BIM technology.Then,from the dynamic point of view,BIM technology is used to simulate different length and width ratios of the apron,and the most suitable length and width ratios of the three-aisle U-shaped apron of Hangzhou Xiaoshan Airport are obtained through comparison.At the same time,the flexible use of aircraft slots in the U-shaped apron was evaluated and compared,and the most suitable location for the consolidation of Class C aircraft slots was obtained.This will provide experience and case studies for future U-ramp design planning in large airports. |
