Strength reduction method for slope based on a ubiquitous-joint criterion and its application

In order to expand the application of strength reduction methods with the ubiquitous-joint criterion,the corresponding program is compiled using FLAC3D software.A procedure for strength reduction in the ubiquitous-joint criterion is proposed to study the safety factor of slopes as well as the relationships of the bedding plane inclination angle β and the safety factor F.The results show that:1) for the bedding rock slope,the various failure modes cause different variations of the safety factor F;2) a bedding rock slope can be divided into two types by the angle between the bedding plane inclination and slope surface inclination α;when α≤45°,the bedding slope can be strictly defined as the subsequent bedding rock slope;when 45°<α<90°,the bedding slope is defined as an oblique bedding slope;3) for bedding rock slopes,the safety factor increases with an increase in α;for inverse bedding slopes,when the bedding plane inclination angle β is small,the safety factor F of the slope increases at first,then decreases with an increase in α;when β is large,the safety factor F increases with an increase in α.