红砂岩顺层边坡监测及变形破坏分析

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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.

Key words： slope engineering red sandstone bedding slope argillization intercalation slope deformation monitoring supporting structure deformation

Received: 20 May 2011

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