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基于离散元的溶塌巨石混合体主动土压力研究
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Study on Active Earth Pressure of Talus Based on Discrete Element Method
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    摘要:

    在喀斯特山区建设中经常需要设计支挡溶塌巨石混合体的挡墙结构.溶塌巨石混合体由于粒径较大,其力学性质与常见的细粒土具有很大差异.但是,大多数土压力理论或试验研究都以细砂等细颗粒材料为研究对象,基于连续介质理论进行分析研究,而缺乏对于较大颗粒粒径的粗粒土如溶塌巨石混合体的土压力研究.针对上述问题,本文采用离散元方法,模拟计算了平动挡墙位移模式下细粒土和不同粒径条件下的溶塌巨石混合体主动土压力,总结得到主动土压力随粒径尺寸的变化规律,并提出了考虑粒径尺寸效应的溶塌巨石混合体主动土压力作用点修正公式.

    Abstract:

    The retaining wall structures have always been designed for supporting talus in karst mountainous area. Because of large particle size of talus, its mechanical properties are very different from fine grained soil,However,most theories and experiments based on continuum theory took the fine grained material such as fine sand as research object, while less research on active earth pressure of large particle size such as talus was performed. Aiming at these problems, the discrete element method was used to simulate the active earth pressure of fine grained soil in translational displacement mode of retaining wall as well as talus in different particle size. The rule of active earth pressure with particle size was obtained through summarizing the results, and the point of active earth pressure correction formula which considered particle size was also deduced.

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徐明?覮,王蕴佳,沈志平,宋二祥,付君宜.基于离散元的溶塌巨石混合体主动土压力研究[J].湖南大学学报:自然科学版,2018,45(S0):123~127

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  • 在线发布日期: 2018-12-29
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