The joint fissures of rock slopes on typical survey points in Nu River Basin were investigated and counted,and the analysis diagram of failure types obtained via a Dips software analysis.Combined with the influence of slope failure factors in Nu River Basin,the failure mechanism of typical rock slopes was discussed.The results showed that the main geological factors affecting the failure and instability of rock slopes thereof were structural planes,lithology,topography,tectonic activities,etc.,and rainfall,excavation and earthquake were the triggering conditions for failure and instability.The failure types of rock slopes there were summarized into three models:toppling failure mode,plane sliding failure mode and wedge sliding failure mode.The failure stage was divided into initial,creep and collapse stage.The stability coefficient of a rock slope under the influence of rainfall and earthquake was analyzed with the Swedge software,and it was found that the safety factor decreased with the decrease of internal friction angle and cohesion caused by rainfall,and the safety factor was inversely proportional to the seismic force coefficient.Under the same seismic force,the safety factor under the action of seismic force along the cross direction was greater than that under the action of seismic force along the horizontal direction.
rocky slopemode of destructionformation mechanismsafety factorNu River Basin
维普
万方数据
