(1. College of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,Hubei 430070,China;2. Wuhan Design and Research Institute Co. Ltd of China Coal Technology and Engineering Group,Wuhan,Hubei 430000,China)
Abstract:The movement patterns of retaining wall has important influences on the distribution of earth pressure and the soil deformation and failure modes of behind the wall. Using the developed valuable retaining wall model test apparatus and quartz sand filler,model tests were carried out in five patterns:translation,rotation around the bottom,rotation around the top,counter clockwise rotation around the midpoint point and clockwise rotation around the midpoint point. The measured earth pressure was compared with the existing calculation solutions,and the earth pressure at rest,ultimate earth pressure and the variation law of earth pressure with deformation were analysed. At the same time,the soil deformation characteristics and failure modes of soil were analysed using the particle image velocimetry technology. The results show that the earth pressure at rest increased linearly along the wall depth,while the measured value was greater than the theoretical solutions due to the over consolidation of sand. There are great differences for the displacement required for reaching the limit state under different displacement patterns. Due to the high compactness of the sand,the measured value of the limit earth pressure of translation,rotation around the bottom and rotation around the top was less than the theoretical solution. The action point of resultant force of the limit earth pressure of counter clockwise rotation and clockwise rotation around the midpoint moved up and down respectively compared with that of rotation around the top and bottom. The slip shear planes of different displacement patterns showed different shapes,and the inclination angles of the measured slip planes was slightly larger than the theoretical values. Rotation around the bottom and clockwise rotation around the midpoint showed progressive failure mode,while translation,rotation around the top and counter clockwise rotation around the midpoint show integral failure mode.
芮 瑞1,蒋 旺1,徐杨青2,夏荣基1,Edo Ekata Emmanuel1,丁锐恒1. 刚性挡土墙位移模式对土压力的影响试验研究[J]. 岩石力学与工程学报, 2023, 42(6): 1534-1545.
RUI Rui1,JIANG Wang1,XU Yangqing2,XIA Rongji1,Edo Ekata Emmanuel1,DING Ruiheng1. Experimental study of the earth pressure on a rigid retaining wall for various patterns of movements. , 2023, 42(6): 1534-1545.
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