SEVERAL POINTS IN DYNAMIC STABILITY ANALYSIS OF ROCK SLOPE
LI Ning1,2,YAO Xianchun1,ZHANG Chengke1
(1. Institute of Geotechnical Engineering,Xi?an University of Technology,Xi?an,Shaanxi 710048,China;
2. State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China)
Abstract:Emphasis is put on discussions of three basic problems in dynamic stability analysis of rock slope:(1) mechanical characteristics of fractured rock masses under dynamic loads;(2) dynamic response and safety assessment of slope;(3) safety evaluation of slope reinforcement measures(mainly anchor cables) under dynamic loads. Based on long-term engineering experiences and researches,assessment methods for dynamic stability of slopes are discussed,especially for high rock slopes under seismic and blasting loads. The strength characteristics and research emphasis for rock masses under dynamic loads are summarized and put forward. The dynamic responses of rock slope are analyzed systematically. It is pointed out that the dynamic stability of rock slopes should be assessed from three aspects,i.e. the trend of dynamic factor of safety,the dynamic fracturing and sliding of potential sliding surface,and the particle vibration velocity of key points in slopes. Finally,the security assessment of prestressed anchor cables under dynamic loads is proposed.
李 宁1,2,姚显春1,张承客1. 岩质边坡动力稳定性分析的几个要点[J]. 岩石力学与工程学报, 2012, 31(5): 873-881.
LI Ning1,2,YAO Xianchun1,ZHANG Chengke1. SEVERAL POINTS IN DYNAMIC STABILITY ANALYSIS OF ROCK SLOPE. , 2012, 31(5): 873-881.
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