Railway line classification

Classification of railway lines 2021-06-20 15:35:44 Railway lines are geotechnical structures where tracks are laid on the roadbed for locomotives and trains. The railway line is a fixed route built for railway transportation, and it is the main body of the railway fixed infrastructure. Railway lines are divided into main lines, station lines, section pipelines, branch lines and special-purpose lines. (1) Main line The main line is a line that connects the station and runs through or straight into the station. Generally speaking, the main line is mostly straight, but its determination is mainly based on artificial settings and historical traditions. Therefore, the lateral strands derived from the turnout may also be the main line, such as the turnout side of the Dujiakan line of the Beijing-Guangzhou high-speed railway. The forward line (connecting to Beijing West Railway Station) is designated as the main line; and the turnout straight line is designated as the connecting line (connecting to Fengtai Station). In the stations of China Railway, the number of the main line is marked with Roman numerals. (2) Station lines Station lines refer to arrival and departure lines, shunting lines, pull-out lines, cargo lines and other lines within the station for designated purposes. Arrival and departure lines are lines for the arrival or departure of trains. Shunting lines are lines for train marshalling and dismantling operations. The pull-out line is set at one end of the shunting yard and is connected to the arrival and departure line. It is exclusively used for train disintegration, marshalling and line transfer as a line for pulling out vehicles. The cargo line is the line for cargo loading and unloading. The other lines designated for the purpose of the station refer to the rescue train staying line, the locomotive running line, the machine standby line, the entire locomotive line, the prohibition on the parking line of the vehicle, the rail scale line, the water filling line, the inverted cargo line, the vehicle scrubbing line, and the hump Circuits such as detour lines and vehicle station repair lines. (3) Sections of pipelines Sections of pipelines refer to lines dedicated to and managed by sections of machinery, engineering, electricity, and power supply. (4) Fork line Fork line refers to the special line that connects to the track in the section or station and leads to the units inside and outside the road. (5) Special-purpose lines Special-purpose lines refer to safety lines and refuge lines. In order to prevent rolling stocks from crossing the warning signs and entering other lines without opening the way, the end-of-line line is the safety line, and conflicts with rolling stocks on other lines. The effective length of the safety line should generally not be less than 50m, and the downhill should not be used in the direction of the vehicle block. The entry of rolling stock into the safety line does not guarantee its own safety. It only serves as a partition to ensure the safety of other rolling stock. In order to prevent trains running on steep and long slopes from losing control due to brake failure, overturning the section or colliding with other rolling stock in the station, an evacuation line is set up. The refuge line is set in front of the small radius curve that the train may subvert in the section; the refuge line can be set at the end of the station or the end of the direction of the train in the station with a steep and long downhill. The length of the refuge line should be able to accommodate a train, and at the same time there should be a reverse slope to ease the forward momentum of the train.