| 刚性挡墙主动破坏墙后土拱效应细观研究 |
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| 引用本文： | 彭述权,李夕兵,樊玲.刚性挡墙主动破坏墙后土拱效应细观研究[J].中南大学学报(自然科学版),2011,42(4). |
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| 作者姓名： | 彭述权 李夕兵 樊玲 |
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| 作者单位： | 中南大学资源与安全工程学院,湖南长沙,410083 |
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| 基金项目： | 教育部博士新教师基金，中国博士后基金，中南大学自由探索计划项目 |
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| 摘 要： | 为了研究土拱效应对挡墙主动土压力非线性分布的影响,运用细观颗粒流方法研究挡墙绕墙顶部转动主动土压力分布和墙后土拱效应细观形成机理,提出跨高比和矢高比表征土拱曲线.研究结果表明:跨高比和矢高比越大,则土拱效应越明显;细观颗粒流方法能够较好地模拟挡墙绕墙顶转动主动土压力分布;当挡墙绕墙顶转动、挡墙位移小于0.05H(H为墙高)时,沿墙高到墙顶0.4H范围内土拱效应较明显,主动土压力呈显著非线性分布;在其他位移模式和位移情况下土拱效应不明显,计算挡墙绕墙顶转动土压力时应考虑土拱效应的影响;若土颗粒和墙体摩擦因素越大,土颗粒刚度越小,则土拱效应越显著.
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| 关 键 词： | 土拱效应 颗粒流 刚性挡墙 绕墙顶转动 |
Meso-scale of soil arching for rigid retaining wall active failure |
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| PENG Shu-quan,LI Xi-bing,FAN Ling.Meso-scale of soil arching for rigid retaining wall active failure[J].Journal of Central South University:Science and Technology,2011,42(4). |
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| Authors: | PENG Shu-quan LI Xi-bing FAN Ling |
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| Institution: | PENG Shu-quan,LI Xi-bing,FAN Ling (School of Resources and Safety Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | In order to study the effect of the soil arching on the nonlinear distribution of active pressure on the rigid retaining wall,the distribution of active pressure with rigid retaining wall movement model of rotation about top(RT) was simulated by meso-scale particle flow code 2D(PFC2D),and the soil arching for the rigid retaining wall active failure was also simulated.In order to analyze the soil arching,the ratio of span to soil height(SH) and the ratio of rise to soil height(RH) were defined.The results sh... |
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| Keywords: | soil arching particle flow rigid retaining wall rotation about top |
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