列車の単線並列運転を支援する軌道の分岐構造の開発

抄録

This study aims to develop the switch and crossing for a single line operation at the double track section. First, the authors design and produce the simplified structure of the switch and crossing for passenger trains which can be installed without the cutting of the existing rails. Secondly, we test the fatigue durability of the front end of the structure by rolling fatigue test device. As a result, the sufficient durability is verified under the condition that the design use period is one month and the total annual axle loads are 1.0×10⁸ kN. Thirdly, we perform the running test of the motor car on the product installed at the test track and confirm that the motor car can pass over the structure at the maximum speed 15 km/h. Fourthly, we perform the vehicle running simulation based on FEM and confirm the running safety of the structure from the point of view of the stress generated at the components, the derailment coefficient and the decrease ratio of wheel loads. Finally, we test the fatigue durability of the specimen and conclude that the welding part of the turn rail and bed plates, the spring for turning rails and rail fastenings have a practically sufficient durability.