| 高层建筑刚性桩复合地基承载受力性状研究 |
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| 引用本文： | 陶景晖,梁书亭,龚维明,吴春良.高层建筑刚性桩复合地基承载受力性状研究[J].东南大学学报(自然科学版),2009(Z2). |
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| 作者姓名： | 陶景晖 梁书亭 龚维明 吴春良 |
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| 作者单位： | 东南大学土木工程学院;江苏省建筑设计研究院有限公司; |
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| 摘 要： | 为研究高层建筑刚性桩复合地基的工作机理和荷载传递特性,在南京某高层建筑刚性桩复合地基工程现场进行了多项复合地基原位载荷试验与应力测试.根据试验数据,对复合地基承载机理、应力分布和变化规律进行了分析与探讨.对四桩复合载荷试验进行了数值模拟,分析结果与实测数据吻合较好.研究结果表明:桩体对桩间土的加固效果随荷载水平增加而提高,桩间土承载力提高系数为1.16,发挥系数为0.88~1.00;桩土应力比随荷载增加而增大,最终稳定于15~17之间;加载过程中,刚性桩的承载力发挥滞后于桩间土,桩侧阻力的发挥早于桩端.基于试验和数值模拟的结果,提出承载力取值标准的建议,可供同类工程设计和研究参考.
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| 关 键 词： | 刚性桩复合地基 载荷试验 数值模拟 桩土应力比 承载力 |
Study on bearing behavior of composite foundation with rigid pile for high-rise buildings |
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| Tao Jinghui, Liang Shuting Gong Weiming Wu Chunliang.Study on bearing behavior of composite foundation with rigid pile for high-rise buildings[J].Journal of Southeast University(Natural Science Edition),2009(Z2). |
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| Authors: | Tao Jinghui Liang Shuting Gong Weiming Wu Chunliang |
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| Institution: | Tao Jinghui1,2 Liang Shuting1 Gong Weiming1 Wu Chunliang2(1 School of Civil Engineering,Southeast University,Nanjing 210096,China) (2 Jiangsu Provincial Architectural Design , Research Institute Co.,Nanjing 210029,China) |
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| Abstract: | To study the working mechanism and load-transferring behavior of the composite foundation with rigid piles in high-rise building,a series of static loading tests and stress tests were carried out at the site of a high-rise building in Nanjing city.According to test results,the load bearing mechanism of composite foundation and the distribution and variation of stress are analyzed.A numerical model of the four-pile composite foundation is generated and the load test is simulated.The simulation results are in... |
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| Keywords: | composite foundation with rigid pile loading test numerical simulation pile-soil stress ratio bearing capacity |
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