| 列车动荷载作用下桩网结构路基土拱效应分析 |
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| 引用本文： | 梁自立,王旭,韩高孝. 列车动荷载作用下桩网结构路基土拱效应分析[J]. 铁道建筑, 2019, 0(4): 94-98 |
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| 作者姓名： | 梁自立 王旭 韩高孝 |
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| 作者单位： | 兰州交通大学土木工程学院 |
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| 基金项目： | 国家自然科学基金(41662017);甘肃省科技计划资助(1606RJZA063) |
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| 摘 要： | 目前对桩网结构路基的研究多是基于静力作用进行的。本文采用ABAQUS有限元分析软件,计算分析了列车动荷载作用对桩网结构路基土拱效应的影响。结果表明:动荷载对土拱效应的影响与路基高度、土工格栅和桩间土性质密切相关;当路基内部形成完整土拱时,动荷载对土拱效应基本无影响,但会引起低矮路基中的非完整土拱发生失稳、退化;土工格栅的存在可以减小动荷载对土拱效应的影响;桩间土较软时,动荷载对土拱效应的影响更为明显。
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| 关 键 词： | 地基处理 桩网结构路基 数值分析 动荷载 土拱效应 |
Analysis of Natural Arch Effect in Subgrade Supported by Geogrid-pile System Under Train Dynamic Load Action |
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| LIANG Zili,WANG Xu,HAN Gaoxiao. Analysis of Natural Arch Effect in Subgrade Supported by Geogrid-pile System Under Train Dynamic Load Action[J]. Railway Engineering, 2019, 0(4): 94-98 |
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| Authors: | LIANG Zili WANG Xu HAN Gaoxiao |
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| Affiliation: | (School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China) |
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| Abstract: | The research on subgrade supported by geogrid-pile system is more likely based on static action.Nature arch effect in subgrade supported by geogrid-pile system under train dynamic load action was studied by using ABA Q US f inite element software in this paper.The results show that the inf luence of dynamic load on natural arch effect is closely related to subgrade height,geogrid and soil properties.When the complete natural arch is formed in the subgrade,the dynamic load has no effect on the natural arch effect,but it will cause instability and degeneration of the incomplete natural arch in the low subgrade.The existence of geogrid can reduce the inf luence of dynamic load on natural arch effect.The inf luence of dynamic load on natural arch effect is more obvious when the soil between piles is soft. |
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| Keywords: | Foundation treatment Subgrade supported by geogrid-pile system Numerical analysis Dynamic load Natural arch effect |
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