Abstract
In this series of studies, a new method is proposed for the inverse calculation of c and φ along a given slip surface in a landslide slope. The method satisfies the condition that the given slip surface must have a minimum factor of safety, as well as the so-called c-tanφ relationship.
In this paper the fundamental concept is first described. Then, an examination from the standpoint of the new approach is given of Saito's method which is considered to be the most logical of all the conventional methods.
Detailed exposition of the inverse calculation procedure will be presented on the basis of the Fellenius, Bishop and Janbu methods in the succeeding papers.
