STUDY ON EMERGENCY REPAIR METHODS FOR ROAD SLOPE DISASTERS

Abstract

 When road slopes are damaged by torrential rains, earthquakes and other disasters, the procedure is to secure basic traffic functions quickly by carrying out emergency repairs and then begin full-fledged repairs for recovery. Though the type of damage suffered varies depending on the disaster site, in most emergency repairs, simple methods such as building temporary guard fences or counterweight filling works are adopted. Because roads in service require a quick temporary recovery from road slope disasters, in many cases the work is carried out based on workers’ experiences gained from past works, and practical know-hows have not been made into systematic procedures. This paper sorts out some 30 years’ worth of accumulated data on road slope disasters that occurred on expressways operated by the three NEXCO companies, groups the disaster patterns, and shows the flow from emergency repair to full-fledged recovery works per pattern. Points to keep in mind are noted so that they may be utilized in the actual emergency recovery works.