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随着城市建设的迅猛发展,抗拔桩作为抗浮基础的主要形式在工程中应用十分广泛。然而国内关于抗拔桩的研究较少,且大部分集中在抗拔桩的承载力方面,对抗拔桩变形分析方法的研究相当有限。在假定桩侧土体荷载传递曲线(p-w曲线)满足理想弹塑性关系、桩侧土体强度随深度为常数或呈线性增长的基础上,推导出计算抗拔桩轴力和变形的弹塑性解析的表达式。通过与模型试验和现场试桩试验结果进行对比表明,该方法能较好地预测抗拔桩的非线性变形,理论预测结果与实测结果是比较吻合的。
With the rapid development of urban construction, the main form of anti-pile as anti-floating foundation is widely used in engineering. However, there are few researches on uplift piles in China, and most of them focus on the bearing capacity of uplift piles, and the research on deformation analysis of uplift piles is rather limited. Based on the assumption that the pw curve of soil mass load transfer curve (pw curve) of piles satisfies the ideal elastoplastic relationship and the soil strength of pile side is constant or linearly increasing with depth, the elastic-plastic analysis to calculate the axial force and deformation of the pile is derived Expression. The comparison between the model test and the field test results shows that this method can better predict the nonlinear deformation of the pile, and the theoretical prediction result is in good agreement with the measured result.