MAINTENANCE AND OPERATIONS OF ROADS IN LANDSLIDE PRONE AREAS

Abstract

In India approximately 15% of the territory (covering over 0.49 million square kilometres) is prone to various degrees of landslide (GSI. 2001). Landslides occur in areas spread over 22 States and Union Territories in our country. Maximum landslides occurrences, which have caused most damage to mankind, have been recorded along the roads in mountainous regions of our country. The landslide often lead to disruption of traffic and essential supplies to higher areas which get cut off due to the landslides as there are only limited access to these areas in mountainous region. Landslides are major challenges that a road engineer faces in the hill areas and hence the knowledge on the causes of landslides and their mitigation measures is a must. This study includes the understanding of the causes of landslides and identifying the various distresses caused to the pavements due to the landslides on NF158. NH72A and NHI09.This study also includes the investigation of three landslides on NH58 i.e. Kaliasaur at Km stone 350.6 , Chamdhar I at Km stone 343 and Chamdhar II at Km stone 341(between Srinagar and Rudraprayag in Uuarakhand).'l'he investigation of these three landslides includes field study, laboratory investigations and slope stability analysis.