| 新型伞状抗拔锚现场试验与数值模拟 |
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| 引用本文： | 徐敏,宋林辉,周峰,梅国雄,宰金珉.新型伞状抗拔锚现场试验与数值模拟[J].岩土力学,2009,30(Z1):24-28. |
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| 作者姓名： | 徐敏 宋林辉 周峰 梅国雄 宰金珉 |
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| 作者单位： | 南京工业大学,土木工程学院,南京,210009 |
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| 基金项目： | 江苏省六大人才高峰项目，国家自然科学基金，江苏省自然科学基金 |
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| 摘 要： | 伞状抗拔锚是一种新型的锚杆装置.通过现场试验获得了其抗拔承载性能,从正常使用条件下Q-S曲线可见,与同场地施工的抗拔桩比较,新型伞状抗拔锚的承载力显著提高.鉴于试验条件的不足,未能获得伞状抗拔锚的极限承载力.为获得伞状锚达到极限状态时的Q-S曲线,采用ABAQUS有限元软件,对伞状抗拔锚和抗拔桩的原位抗拔试验进行数值模拟.模拟主要分2步来实现,先通过调节参数得到与试验一致的正常使用条件下的Q-S曲线,然后增加荷载,得到极限状态下的伞状抗拔锚的Q-S曲线.结果显示,伞状抗拔锚能够充分调动其扩大端的土体参与抗拔,得到的Q-S曲线表明伞状锚的抗拔性能存在很大潜力,具有显著的优越性.
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| 关 键 词： | 伞状抗拔锚 承载性能 抗拔桩 数值模拟 |
| 收稿时间： | 2009-03-20 |
In-situ test and numerical simulation of the umbrella-shaped uplift anchor |
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| XU Min,SONG Lin-hui,ZHOU Feng,MEI Guo-xiong,ZAI Jin-min.In-situ test and numerical simulation of the umbrella-shaped uplift anchor[J].Rock and Soil Mechanics,2009,30(Z1):24-28. |
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| Authors: | XU Min SONG Lin-hui ZHOU Feng MEI Guo-xiong ZAI Jin-min |
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| Institution: | College of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | The umbrella-shaped uplift anchor is an innovative anchor device. Based on the in-situ test, the uplift resistance behavior of the umbrella-shaped uplift anchor has been carried out. Compared with uplift piles at the same site, the capacity of the umbrella-shaped uplift anchors can be obviously improved, while the Q-S curve is under the normal state condition. Because the test conditions are not adequate enough to obtain the ultimate bearing capacity of the umbrella-shaped uplift anchor, the in-situ test of the umbrella-shaped uplift anchor and uplift piles have been numerically simulated with the ABAQUS finite element software, so that the Q-S curve of the umbrella-shaped uplift anchor at the limit state can be obtained. The simulation is divided into two stages. The first stage is adjusting the parameters to make it consistent with the test Q-S curve under the normal state condition. And the second stage is increasing the load to get the Q-S curve of the umbrella-shaped uplift anchor at the limit state. The result shows that the umbrella-shaped uplift anchor can fully mobilize its expanding soil participating in uplift. The Q-S curve further indicates that the uplift resistance behavior of the umbrella-shaped anchor has great potentiality and prominent superiority. |
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| Keywords: | umbrella-shaped uplift anchor bearing behavior uplift pile numerical simulation |
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