| 预应力抗拔扩底桩的设计原理与应用 |
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| 引用本文： | 姚梅红.预应力抗拔扩底桩的设计原理与应用[J].福建工程学院学报,2016,0(3):218-222. |
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| 作者姓名： | 姚梅红 |
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| 作者单位： | 福建船政交通职业学院道路工程系 |
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| 摘 要： | 结合工程实践，以高层建筑附建式纯地下室与主体间的沉降差控制为目标，论述嵌岩扩底灌注桩抗拔承载力的合理估算、纯地下室采用桩基应对整体抗浮不足的优化设计方法。工程实践证明，嵌岩扩底桩可显著提高单桩的抗拔承载力，其嵌岩段抗拔极限侧阻力的估算可参照承压嵌岩桩的方法，以岩石单轴饱和抗压强度标准值表达桩的极限侧阻力标准值，并乘以抗拔折减系数来取值。
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| 关 键 词： | 抗拔灌注桩 扩底端 预应力 裂缝控制 |
The evaluation of bearing capacity and the optimization design of anti-floating capacity for forrock-socketed anti-uplift piles |
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| Yao Meihong.The evaluation of bearing capacity and the optimization design of anti-floating capacity for forrock-socketed anti-uplift piles[J].Journal of Fujian University of Technology,2016,0(3):218-222. |
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| Authors: | Yao Meihong |
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| Institution: | Road Engineering Department, Fujian Chuangzheng Communications College |
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| Abstract: | Targeted at a scientific control of differential settlement between the attached pure basement of high-rise buildings and the main body in engineering projects, the reasonable estimation of the anti-uplift capacity of rock embedded under-reamed cast-in-situ piles and the optimization design schemes for pure basement to improve the overall anti-floating capacity were discussed. The engineering practical results indicate that the rock embedded under-reamed cast-in-situ piles can increase significantly the uplift bearing capacity of single piles. The estimation of ultimate side uplift resistance of the cast-in-situ piles’ embedded part can refer to the method used in rock-embedded pressure bearing piles. The ultimate side resistance standard value of the piles can be expressed by rock uniaxial saturated anti-compressive strength standard value multiplied by the uplift reduction factor. |
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| Keywords: | uplift cast-in-situ pile under-reamed pile bottom prestress cracking control |
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