Case Study of Renovation on Alishan Route 18 after Typhoon Morakot

Abstract

Typhoon Morakot has brought Taiwan tremendous rainfall in a hundred-year recurrence period. The roads and houses in the middle and southern part of Taiwan have suffered from landslides, debris flows, and floods. Erosion of road foundations, sliding of slopes, and collapse of bridges have paralyzed the road system. Using Alishan Route 18 as an example, this paper discusses different causes, types, and renovation methods of slope disasters for future reference.