STUDY OF OVERTURNING STABILITY SAFETY FACTOR OF RETAINING WALL UNDER SEISMIC ACTION
HUANG Rui1，XIA Tangdai1，CHEN Weiyun2
(1. Key Laboratory of Soft Soils and Geoenvironmental Engineering，Ministry of Education，Zhejiang University，Hangzhou，Zhejiang 310058，China；2. College of Transportation Science and Engineering，Nanjing University of Technology，
Nanjing，Jiangsu 210009，China)
Abstract：Based on pseudo-dynamic method，a formula of stability safety factor of retaining wall against overturning under seismic action is derived，considering the inclination conditions of retaining wall back and backfill soil. Numerical results indicate that the stability safety factor increases with the increase of soil friction angle，wall friction angle and wall inclination angle；but it decreases with the increase of seismic amplification factor，horizontal seismic acceleration coefficient and backfill inclination angle. Thereinto，only under violent earthquake action，the seismic amplification effect can emerge gradually；at the same time，the influences of friction angles on the stability relatively weaken instead. The various trends of stability safety factors with seismic actions are in basic agreement under different wall inclination angles and backfill inclination angles. Comparing the calculating results by two methods，the overturning stability safety factor by pseudo-dynamic method considering the effects of earthquake period and seismic waves into account，is larger than that by pseudo-static method.
SHUKLA S K，GUPTA S K，SIVAKUGAN N. Active earth pressure on retaining wall for c-soil backfill under seismic loading condition[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，135(5)：690-696.
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2013, Vol. 32 
