| 预应力锚杆柔性支护技术的数值分析 |
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| 引用本文： | 贾金青,郑卫锋,陈国周.预应力锚杆柔性支护技术的数值分析[J].岩石力学与工程学报,2005,24(21):3978-3982. |
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| 作者姓名： | 贾金青 郑卫锋 陈国周 |
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| 作者单位： | 大连理工大学,土木水利学院,辽宁,大连,116024 |
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| 摘 要： | 对深基坑支护的一种新技术——预应力锚杆柔性支护法作了简单介绍。运用有限差分方法对其进行了分析研究，并与相同条件下的土钉支护进行了比较分析，计算表明预应力对基坑潜在滑移场的控制是非常有效的。基于改进的杆系有限元法，通过实际工程对预应力锚杆柔性支护技术进行了数值计算，得到了预应力值对基坑位移的影响曲线及锚杆轴力的分布规律，并与现场监测进行了比较，验证了程序计算的正确性。通过数值分析，体现了该技术在严格控制基坑变形、超深基坑支护方面具有明显的优越性。
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| 关 键 词： | 岩土工程 预应力锚杆 柔性支护 深基坑 杆系有限元 数值分析 |
| 文章编号： | 1000-6915（2005）21-3978-05 |
| 收稿时间： | 2005-06-26 |
| 修稿时间： | 2005-06-262005-09-15 |
NUMERICAL ANALYSIS OF PRESTRESSED ANCHOR FLEXIBLE RETAINING METHOD |
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| JIA Jin-qing,ZHENG Wei-feng,CHEN Guo-zhou.NUMERICAL ANALYSIS OF PRESTRESSED ANCHOR FLEXIBLE RETAINING METHOD[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(21):3978-3982. |
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| Authors: | JIA Jin-qing ZHENG Wei-feng CHEN Guo-zhou |
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| Affiliation: | School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | A new retaining method for deep excavation-prestressed anchor flexible retaining method has been developed by the authors. This technique is studied by finite difference method; and the calculating results are compared with the soil-nailed support system. Critical slide zone of deep excavation is controlled by prestress values. Based on the modified bar system finite element method, the prestressed anchor flexible retaining system is calculated and analyzed through a practical engineering. The distribution rules of horizontal displacements and anchor axial force are calculated. By the numerical analysis, its advantages such as small displacements and application to super-deep excavations are investigated. |
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| Keywords: | geotechnical engineering prestressed anchor flexible retaining deep excavation bar system finite element method numerical analysis |
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