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| MONITORING AND DEFORMATION FAILURE ANALYSIS OF RED SANDSTONE BEDDING SLOPE |
| FENG Zhen1，2，JIN Fuxi3，GONG Yifang4 |
| (1. Key Laboratory of Neotectonic Movement and Goehazard，Ministry of Land and Resources，Beijing 100081，China；2. Institute of Geomechanics，Chinese Academy of Geological Sciences，Beijing 100081，China；3. School of Geosciences and Info-physics，Central South University，Changsha，Hunan 410083，China；4. Hunan Institute of Nonferrous Geological Exploration and Research，Changsha，Hunan 410015，China) |
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Abstract Because of the characteristics of weathering disintegrating easily，low long-term strength and argillization intercalation development for red sandstone，toe excavation produces enormous susceptible bedding slopes. Combining a construction project，the main reasons of red sandstone bedding slope failure are unfavorable geological structure，toe excavation and precipitation. According to long-term slope monitoring data，the slope is still in the stage of creep deformation after treatment of anti-slide piles and the slope and anti-slide piles deform to different extents. Based on previous research and data processing of long-term slope monitoring，analysis results indicate that the main reasons of deformation of slope and piles are continuous and intensive precipitation and sliding surface going deeper. New sliding surface is above stable underground water table，so that eluviations and water content increase of argillization intercalation could happen only under continuous and intensive precipitation which lead to shear strength reducing and residual sliding force increasing. Piles deform to adjust increasing residual sliding force.
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Received: 20 May 2011
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2011, Vol. 30 
