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| Quantitative research on two strength reduction factors of slope based on mutation characteristic |
| Received:March 05, 2018 Revised:May 09, 2018 |
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| DOI：10.7511/jslx20180305001 |
| KeyWord:slope stability analysis double strength reduction technique mutation theory reduction ratio lower bound analysis |
| Author | Institution |
| 苏永华 |
湖南大学 土木工程学院, 长沙 |
| 李帅 |
河南省交通规划设计研究院股份有限公司, 郑州 |
| 方砚兵 |
湖南大学 土木工程学院, 长沙 |
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| Abstract: |
| Failure of a slope is a process of gradual evolution to mutational destruction.The shear strength parameters c and φ have different effect paths and decay rates during the destruction process.Currently,the double strength reduction technique has been widely accepted gradually in the field of slope stability evaluation,but the real relationship of reduction between c and φ is difficult to define accurately.Based on the maximal principle of bearing capacity of a slope to external environment,mutation theory of nonlinear analysis is introduced.The ultimate bearing capacity of a slope is taken as the evaluation basis,the model function between the reduction ratio and the ultimate bearing capacity is built,and then,the reduction ratio of c and φ is quantified.Utilizing a slope example,rationalization of the proposed method is verified according to comparison with some reported methods.Evolvement rule and mechanism between c and φ as well as the slope angle and the reduction ratio are explored.The implementation idea of this research may provide helpful reference for discussion of double strength reduction technique. |
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