| 基于剪胀效应的桩底嵌岩锚杆荷载传递分析法 |
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| 引用本文： | 赵明华,龙照,邹新军.基于剪胀效应的桩底嵌岩锚杆荷载传递分析法[J].岩土力学,2008,29(7):1938-1942. |
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| 作者姓名： | 赵明华 龙照 邹新军 |
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| 作者单位： | 湖南大学 岩土工程研究所，长沙 410082 |
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| 摘 要： | 针对基桩竖向承载力自锚法测试体系中桩底嵌岩锚杆的受力特点，基于锚固体-岩石作用的剪胀机制，建立了适合于桩底嵌岩锚杆的荷载传递函数，并由此推导出锚杆临界锚固长度的解析解。然后，基于该解答探讨了桩底嵌岩锚杆锚固段摩阻力沿锚固长度的分布规律及其影响，并提出可近似考虑各因素综合影响效果的? 值。工程算例对比分析结果表明，其计算结果与实测值吻合较好。
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| 关 键 词： | 桩底嵌岩锚杆 荷载传递 剪胀效应 临界锚固长度 桩基荷载试验 |
| 收稿时间： | 2006-06-16 |
Load transfer method of rock-socketed anchoring rods under pile tip considering dilatancy effect |
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| ZHAO Ming-hua,LONG Zhao,ZOU Xin-jun.Load transfer method of rock-socketed anchoring rods under pile tip considering dilatancy effect[J].Rock and Soil Mechanics,2008,29(7):1938-1942. |
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| Authors: | ZHAO Ming-hua LONG Zhao ZOU Xin-jun |
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| Institution: | Institute of Geotechnical Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | According to the mechanical characteristics of rock-socketed anchoring rods under pile toe in the system of vertical load-bearing capacity test of pile foundation by the self-anchored technique, a new load transferring function suitable for anchoring rods under pile toe is set up based on the dilatancy effect between anchorage-body and surrounding rock; and an analytical solution of the critical anchorage length is obtained as well. Then, the distribution of frictional resistance along the anchorage length and the influencing factors are discussed in detail based on the obtained analytical solution; and a parameter ? is introduced to consider the comprehensive influencing effect of various factors approximatively. Comparative analysis result of an engineering example shows that the calculated values by the present method agree well with the measured data. |
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| Keywords: | rock-socketed anchoring rods under pile toe load transferring dilatancy effect critical anchorage length load-bearing test on pile |
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