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| Performance of static drill rooted nodular piles under compression |
| ZHOU Jia-jin1, GONG Xiao-nan1, WANG Kui-hua1, ZHANG Ri-hong2 |
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China；
2. ZDOON Building material group, Ningbo 315000, China |
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Abstract A series of field tests and finite element software ABAQUS were used to investigate the behavior of the static drill rooted nodular pile under compression. The simulation results were assumed to be reliable through the comparison with the measured results. The simulation results showed that: the bearing capacity of the nodular pile is higher than the bearing capacity of the pipe pile when using the static drill rooted method|the bearing capacity of the composite pile decreases with the increasing distance of adjacent nodes, while the decrement value is small; the strength of the cemented soil along the shaft has little influence on the bearing capacity of the composite pile; the friction coefficient of the cemented soil-soil interface is an important factor for the behavior of the composite pile under compression; a reasonable range for the radius of the cemented soil is proposed in practical projects.
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Published: 26 November 2014
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静钻根植竹节桩抗压承载性能
为了对静钻根植竹节桩荷载传递机理及承载性能进行研究,进行现场静载试验和ABAQUS有限元建模计算.通过有限元模拟结果与现场试验结果的对比,验证所建立数值模型的可靠性.模拟结果表明：在静钻根植工法中运用竹节桩构成的组合桩基比运用PHC管桩构成的组合桩基的承载力高,且随着自身节间距的增加,竹节桩的承载力有所减小,但减小幅度不大；静钻根植竹节桩承载力受桩周水泥土强度的影响不大；水泥土—桩周土界面摩擦系数是影响组合桩承载力的一个重要因素；在实际工程中,存在一个合理的水泥土半径取值范围.
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