基于工程限速和尽端式车站布置的广珠澳高铁速度目标值研究OA北大核心

The target value of high-speed railway speed has great influence on track direction,project investment and operation effect.With the research and promotion of 600 km/h maglev train rolling off the line and 400 km/h high speed railway standard from Chengdu to Chongqing,Chinese high speed railway technology is developing towards integration and high-speed direction.The higher speed grade of high-speed rail puts forward higher requirements for line smoothness,acceleration and deceleration performances of the train,and train control system etc.However,many high-speed railways are introduced into the main urban areas of developed cities,which are controlled by construction structures,demolition,station spacing and other projects.The project with large curve radius and high speed target value need more investment,the actual operation also cannot reach the target speed.The high-speed railway from Guangzhou to Zhuhai to Macao is an important north-south high-speed railway connecting the east bank of the Pearl River in the Greater Bay Area.Guangzhou North Station to Baiyun Airport Station is only 17.7 km,but with many numerous constructions.The distance from Hezhou to Hengqin is only 22.3 km,and Hengqin Station is the end of the line,so all trains must start and stop at Hengqin Station.The importance of function localization is contradictory with the limitation of engineering conditions,so the speed target value should be determined reasonably.Firstly,based on the analysis of the innovative development technology of 400 km/h high-speed railway,it is concluded that the travel time of Guangzhou-Zhuhai-Macao high-speed railway corridor using 400 km/h scheme is only save 2 min than 350 km/h scheme,the project investment needs to increase 1.32 billion yuan,the coordination and matching of the road network is poor,and also exist technical risks.Secondly,from the aspects of road network coordination and matching,project investment,operation effect,passenger flow impact,economic benefits etc,the Guangzhou to Zhuhai to Macao high-speed railway adopts three speed target value schemes of 250 km/h,300 km/h and 350 km/h.It is concluded the Guangzhou to Zhuhai to Macao high-speed railway should adopt 350 km/h speed target value scheme.Then,according to the engineering conditions and train simulation traction calculation,it is concluded the step speed limit scheme of 200 km/h should be adopted for the section from Guangzhou North to Baiyun Airport,and the scheme of 350 km/h should be adopted for the section from Hezhou to Hengqin.Since all trains need to start and stop at Hengqin Station,a small curve radius can be adopted for the inbound end of Hengqin Station to improve the introduction conditions of the line and save the project investment.The conclusion of this study strongly supports the selection of a more reasonable construction scheme for the high-speed railway from Guangzhou to Zhuhai to Macao,and also provides ideas and references for other similar projects.