WANG Fei, LIANG Xuli, DU Jianpo. 2016: STABILITY ANALYSIS AND RELIABILITY STUDY OF ANTI-OVER-TURNING STABILITY OF ROCK SLOPE UNDER SEISMIC LOAD. JOURNAL OF ENGINEERING GEOLOGY, 24(6): 1126-1135. DOI: 10.13544/j.cnki.jeg.2016.06.012
    Citation: WANG Fei, LIANG Xuli, DU Jianpo. 2016: STABILITY ANALYSIS AND RELIABILITY STUDY OF ANTI-OVER-TURNING STABILITY OF ROCK SLOPE UNDER SEISMIC LOAD. JOURNAL OF ENGINEERING GEOLOGY, 24(6): 1126-1135. DOI: 10.13544/j.cnki.jeg.2016.06.012

    STABILITY ANALYSIS AND RELIABILITY STUDY OF ANTI-OVER-TURNING STABILITY OF ROCK SLOPE UNDER SEISMIC LOAD

    • In earthquake-prone areas, seismic load can significantly influence the stability of rock slope. Therefore, accurately and effectively estimate the stability is very important in seismic design of rock slope. Safety coefficient method has its limitation as this method ignores the uncertainties of seismic load and other influential factors. Under the condition that the smooth flow gap is uncongested and congested, this paper calculated the anti-overturning safety factor of rock slope by pseudo-dynamic method, and analyzed the influence of the seismic load, surcharge and depths of water in the tensile crack on anti-overturning safety factors of rock slope. Based on the deterministic calculation model of anti-overturning stability and in consideration of the variability of seismic load, surcharge and the depth of water in tension crack, the reliability analysis of anti-overturing stability of rock slope is developed. The mean values and coefficients of variation of seismic load, surcharge and depths of water in the tensile crack on anti-overturning reliability index were analyzed. Based on the study of this paper, it can be found that the anti-overturning safety factor of rock slope decreased rapidly when the smooth flow gap is congested. Besides, the variability of seismic load and other influential factors can significantly influence the stability of rock slope. Therefore, safety factor and reliability index are combined to estimate the anti-overturning stability is benefical to the safety of seismic design of rock slope by appropriately considering the amplification factor.
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