What Is a Return Bend?

The turn-around railway is one of the ways to climb hills and mountains after entering a place in a certain direction on a route with a steep slope and then turning back at an acute angle in the opposite direction. In addition, a sharp turn in the opposite direction when traveling in a similar way on a highway in a short distance can also be called a turn-around route, a zigzag road, also known as a "hairpin curve". The current return-type name is In this way, the railway routes and station facilities on the hills and mountains are rarely called by highways. In the case of inadequate engineering technology in the early days, the reentrant route is a long tunnel project that avoids the route over mountains and mountains. It speeds up the construction and is completed at a relatively economical cost. At present, under the prevailing conditions of long tunnel projects, this type of railway line is gradually Decline. In pedestrian walkway facilities, the retreat-like facility is a staircase.

Turn-around railway

Right!

The turn-around railway is one of the ways to climb hills and mountains after entering a place in a certain direction on a route with a steep slope and then turning back at an acute angle in the opposite direction. In addition, a sharp turn in the opposite direction when traveling in a similar way on a highway in a short distance can also be called a turn-around route, a zigzag road, also known as a "hairpin curve". The current return-type name is In this way, the railway routes and station facilities on the hills and mountains are rarely called by highways. In the case of inadequate engineering technology in the early days, the reentrant route is a long tunnel project that avoids the route over mountains and mountains. It speeds up the construction and is completed at a relatively economical cost. At present, under the prevailing conditions of long tunnel projects, this type of railway line is gradually Decline. In pedestrian walkway facilities, the retreat-like facility is a staircase.

The English source of reentry comes from zigzag (zigzag, zigzag) and hairpinturn or hairpinbend (sharp turn). In American, it is called switchback (Z-shaped route), but switchback means ups and downs of roller coaster in English.

Regardless of the interpretation, the reflexive interpretation means "the action of moving in a zigzag direction horizontally or vertically" in terms of behavior. The term used in Japanese railways also means "driving mode that requires a later retreat when climbing up a hill", but it cannot be used to change the direction of a train when a running train arrives at the terminal.

In addition to the long construction period of the tunnel over the mountains, the cost is also high.

However, the disadvantage is that the length of the train is limited by the effective length of the return route. If the train hauled by the locomotive cannot turn around, it must be driven in a propulsive manner to increase the risk of operation. Currently, it is solved by push-pull, joint control or decentralized power. At the same time, the time of U-turn or shunting will increase driving time.