Disaster Reduction Techniques of Railway Route Selection in Mountainous Regions with High Earthquake Intensity

To reduce earthquake-induced disasters of railway in mountainous regions with a high earthquake intensity from fountainhead, the disaster reduction techniques of the selection of transportation corridors and the space layout of railway lines, were researched based on the concept of risk control. From the fault tectonic geomorphology theory, landform patterns formed by active faults and seismic disasters were analyzed, and the selection principles of transportation corridors were obtained. From the wave motion theory, the topography effects of seismic wave propagation reflected in the Lushan and Wenchuan earthquakes were analyzed, and the key points of line space layout were worked out. The research result shows that lexural basin on footwall of reversed faults, rift basin on hanging wall of normal faults, and rift basin and pull-apart basin on strike-slip faults are available geomorphic units of railway corridors. Elevation amplification effect may not be considered in the route elevation determination of large sections. Canyon routes shall be avoided laying in the incident side of seismic waves. Earthquake near-field routes shall be selected along the hillside facing wave propagation direction, while far-field routes in the opposite side. Sharp curves must be avoided, moreover, deep cutting slopes and tall retaining structures shall be avoided layouting in the convex side of a curve.