On Developing H igh-Speed Evacuated Tube Transportation in China

The necessity and feasibility of evacuated tube high-speed transportation were discussed. The fundamental problems of this technology, e. g. pressure in the tube, coefficient of coverage and other related techniques, were analyzed in detai.l More discussed were the strategy and technical choice ofdeveloping this kind of transportation in China. The system consisted of partial pressure in tube, high-temperature super conducting magnetic levitation and synchronic linearmotor traction is proposed to be the variantofdeveloping research, so that the 600-1 000 km/h high-speed evacuated tube trainmightbe able to run commercially by 2030.