Evaluation of urgency for failures based on temporal variation in strain and strain rate of landslide

Abstract

  This paper presents a method to evaluate the urgency of failure based on temporal variation in strain and strain rate observed in the 34 landslides. The results show that the reliability of conventional prediction method of failure time tended to be improved by use of data observed after the rapid increase of strain and strain rate (acceleration point). In collected records, the strain and strain rate at the acceleration point and just before failure exceeded certain values. These results suggest that the urgency of failure can be classified into three stages by setting threshold values for strain and strain rate of landslide.