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| 桩承式路堤土拱效应的三维数值模拟 | |
| 引用本文： | 余闯,刘松玉,杜广印,杨昭宇,吴荷君.桩承式路堤土拱效应的三维数值模拟[J].东南大学学报(自然科学版),2009,39(1). |
| 作者姓名： | 余闯 刘松玉 杜广印 杨昭宇 吴荷君 |
| 作者单位： | 1. 温州大学建筑与土木工程学院,温州,325035;东南大学岩土工程研究所,南京,210096 2. 东南大学岩土工程研究所,南京,210096 3. 温州大学建筑与土木工程学院,温州,325035 |
| 基金项目： | 住房和城乡建设部科技计划，东南大学优秀博士学位论文基金 |
| 摘 要： | 结合模型试验结果,建立了三维有限元数值模型,对桩承式路堤中土体竖向应力分布规律进行了分析,计算结果和实测结果具有很好的一致性,而且反映出了土体竖向应力随深度的分布规律、土拱作用机理以及土拱的作用范围.模型试验和计算结果显示:桩承式路堤中土拱内部竖向应力随深度非线性减小,而土拱上部路堤中土体应力随深度近似线性增加.研究还发现,随着荷载水平和桩体-桩间土沉降差的变化,土拱的发生区域也在变化,实际土拱作用的影响范围在路堤底面以上约1倍桩间距的区域,要大于目前理论解答所做的假设. |
| 关 键 词： | 桩承式路堤 土拱效应 三维数值计算 竖向应力 |
Three dimensional simulations on soil arching of piled embankments |
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| Yu Chuang,Liu Songyu,Du Guangyin,Yang Zhaoyu,Wu Hejun.Three dimensional simulations on soil arching of piled embankments[J].Journal of Southeast University(Natural Science Edition),2009,39(1). | |
| Authors: | Yu Chuang Liu Songyu Du Guangyin Yang Zhaoyu Wu Hejun |
| Institution: | 1College of Architecture and Civil Engineering;Wenzhou University;Wenzhou 325035;China;2Institute of Geotechnical Engineering;Southeast University;Nanjing 210096;China |
| Abstract: | Based on the model test,a three-dimensional numerical model has been established to simulate the behavior of piled embankments.The simulated results show good agreements with measured data.The presented results demonstrate that the vertical stress in the inner arching decreases with depth non-linearly and reaches the minimum value at the bottom of embankment.Nevertheless,the influenced height of soil aching depends on stress level and differential settlements between pile and soil.The soil aching area is lo... |
| Keywords: | piled embankments soil arching effect three dimensional simulations vertical stress |
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