| The existence of high rock slope is one important factor which restricts highway operation , and the judgment of the high rock slope stability is also complex and necessary. The sensibility parameter problem of high rock slope stability is studied in this text and it is analyzed by large nonlinear FEM software MSC.MARC using theoretical foundation of the strength reduction FEM . Based on the current research level, discuss the stability of rockmass slope which is influenced by the change of the various parameters, and analysis the sensitive degree of the stability to various parameters . The results of single factor influence computation based on multi-operating conditions analytical study indicate that the most sensitive parameter is the friction angleφ, the next are the Cohesiveness c and the gravity loadγ.Based on the monitoring study of the high rock slope in Dian-Lin expressway, the results that rock slope under unloading effect has the trend to the lateral expansion, the sensibility location of stress is at the bottom of rock slope and not at the top ; and the change scope of the stress is bigger than the displacement are concluded according to the analysis of the monitoring results.Accordingly , the union the characteristic value of high rock slope of expressway to study the variety regulation of stress field and the sensitive part. All these work can do some work for the foundation of rockmass slope early-warning system with highway feature. |
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