基于<em>p-y</em>曲线法的扩底楔形桩水平向承载力理论分析

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中国公路学报 ›› 2016, Vol. 29 ›› Issue (6) : 179-185,206.

道路工程

基于p-y曲线法的扩底楔形桩水平向承载力理论分析

孔纲强^1,2, 周立朵^1,2, 杨庆³, 彭怀风^1,2

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Theoretical Analysis on Horizontal Bearing Capacity of Belled Wedge Pile Based on p-y Curves

KONG Gang-qiang^1,2, ZHOU Li-duo^1,2, YANG Qing³, PENG Huai-feng^1,2

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摘要

为给水平荷载作用下扩底楔形桩承载力计算提供理论方法,基于常规等截面桩p-y曲线法,考虑纵向截面形式的变化,建立了水平荷载作用下扩底楔形桩的简化理论计算方法;通过与2个模型试验及其他理论计算结果的对比分析,验证了所建立理论模型的准确性和可靠性;分析了扩大头直径、楔形角、桩长、桩体弹性模量以及水平向荷载-位移等级等因素对扩底楔形桩水平向承载力特性的影响规律。结果表明:所建立的简单理论计算方法可以有效计算水平荷载作用下扩底楔形桩的承载力特性,也可以推广应用于其他纵向截面异形桩的水平向承载力设计计算中。

Abstract

In order to establish theoretical calculation method for bearing capacity of belled wedge pile under horizontal loading, based on p-y curves calculation method for conventional equal section pile, considering the change of longitudinal cross section forms, a simplified theoretical calculation method for belled wedge pile under horizontal loading was built. The accuracy and reliability of the theoretical model were verified by comparing the results obtained by two model tests with those by other theoretical models. The influence laws of factors including enlarged pile base, taper angle, pile length, pile modulus, and lateral load grades on the horizontal bearing capacity of belled wedge pile were analyzed. The results show that the proposed theoretical calculation method can calculate bearing capacity of belled wedge pile simply and efficiently which can be applied to the calculation of horizontal bearing capacity of other special vertical section piles.

导出引用

孔纲强, 周立朵, 杨庆, 彭怀风. 基于p-y曲线法的扩底楔形桩水平向承载力理论分析[J]. 中国公路学报, 2016, 29(6): 179-185,206

KONG Gang-qiang, ZHOU Li-duo, YANG Qing, PENG Huai-feng. Theoretical Analysis on Horizontal Bearing Capacity of Belled Wedge Pile Based on p-y Curves[J]. China Journal of Highway and Transport, 2016, 29(6): 179-185,206

中图分类号： U416.1

参考文献

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基金

国家自然科学基金项目(51278170,51478165)

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2015-09-04	2016-06-20
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2016-07-04

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