Linear track structure of rail transit orbit, the main foreign linear motor rail transit track structure used in the analysis of the structure for the linear motor track traffic mechanics characteristics of the development of this kind of rail transit in China is in the track structure design and construction In the need to study the key technologies for a preliminary discussion.
As a new kind of urban rail transit technology, linear motor rail transit has not operated a precedent in our country. Its large slope and small radius adaptability have very important application value to urban rail transit in our country.
Linear motor rail transit is the use of linear induction motor drive technology, between the magnetic levitation and wheel rail system of the track system, different from the traditional rail transit traction mode. The orbital structure is the basis of the traffic control of the rail transit system. It is very complicated that the track structure induction plate should be placed on the rail bed, which is of importance to the dimensional chain of the rail, the ballast bed and the three rails.
Linear track structure of rail transit, its mechanical properties and the traditional track structure is quite different. In the track structure, the rail is the main part, with the increase of the axle load of the subway vehicles, the annual increase of the total mass and the increase of the train speed have the tendency of selecting the heavy rail at present. However, In terms of foreign countries generally use 50kg / m rails, some also use 60kg / m rails.
Linear track orbit structure of the main track in the overall structure of the main track bed, only a small amount of the yard line with slag track. , Vancouver, Canada, mainly to the overhead line linear motor track system with direct-coupled orbit structure; Japanese underground linear track structure is the use of long rail sleeper integrated track bed. Whether in Canada or Japan, induction pads at the covered turnout are disconnected with shorter length induction pads on the turnout of the yard.
As an advanced form of rail transit, linear motor rail transit has just started in our country, and there are still some shortages in the research of track structure in our country. Based on the actual situation in China, it is necessary to conduct thorough and meticulous research on the design method of orbital structure. I hope that through further analysis and research, I hope to lay a theoretical foundation for the future wide application of the system in China.
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