| 高速铁路岩溶地区桩基后压浆仿真分析 |
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| 引用本文： | 张伟,张凯,马建林,白丁伟. 高速铁路岩溶地区桩基后压浆仿真分析[J]. 路基工程, 2018, 0(6): 94-99. DOI: 10.13379/j.issn.1003-8825.2018.06.20 |
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| 作者姓名： | 张伟 张凯 马建林 白丁伟 |
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| 作者单位： | 1.中交第三航务工程局有限公司交建工程分公司, 上海 200000 |
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| 基金项目： | 国家重点研发计划（2016YFC0802203-1） |
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| 摘 要： | 为分析后压浆技术对高速铁路岩溶地区桥梁桩基承载特性的影响,运用有限元软件PLAXIS模拟分析了顺义特大桥#190墩钻孔灌注试桩注浆前后的承载性能变化。结果表明:①后压浆能在岩溶地区桥梁桩基发挥重要的作用,提高桩基承载力约85%,减小沉降约58%;②数值模拟结果与现场试验结果吻合度较好,能够很好反映现场实际的工程状况。
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| 关 键 词： | 岩溶地区 灌注桩 后注浆 承载特性 数值模拟 |
| 收稿时间： | 2019-11-11 |
Simulation Analysis of Post Grouting for Pile Foundation in Karst Regions along High Speed Railway |
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| Abstract: | In order to analyze the influence of post-grouting technique on bearing characteristics of bridge pile foundation in karst regions along high-speed railway, the finite element software PLAXIS was used to simulate and analyze, for the cast-in-place bored piles for the #190 pier of Shunyi Grand Bridge, how the bearing behavior thereof changes before and after grouting. The result shows that, ① the post-grouting can play an important role in bridge pile foundation in karst regions, and significantly improve the pile bearing capacity by about 85% and reduce the settlement by about 58%; ② the result of numerical simulation is consistent with that of the field test, and may reflect the actual conditions of works on the site. |
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