针对水平承载作用下新型扩底楔形桩的理论计算方法研究相对较少的情况,文章基于文克尔地基模型,把桩周土离散为一系列独立的弹簧模型,然后根据欧拉-伯努利梁的挠曲线微分方程,建立了扩底楔形桩在水平荷载作用下桩身变形和内力的理论计算方法。通过对水平荷载作用下扩底楔形桩透明土模型试验结果的对比分析,验证了文章所建立理论模型的准确性和可靠性,并分析了扩大头直径、楔形角、桩长、桩体弹性模量以及水平荷载等级等因素对扩底楔形桩水平向承载力特性的影响规律,研究结果表明,该理论计算方法可以简单、有效地计算水平荷载作用下扩底楔形桩承载力特性。
In this paper, considering the few studies that have been conducted so far on the theoretical calculation method for belled wedge piles under horizontal bearings, a series of separate discrete spring models were proposed for the soil around piles based on the Winkler foundation model, and theoretical calculations for the deformation and the internal force of the piles were established based on the deflection differential equation of the Euler-Bernoulli beam. Additionally, the accuracy and reliability of the models were verified by a comparison with the results from a transpar- ent soil model test, and the influences from the enlarged base diameter, wedge angle, pile length, pile elasticity modulus and horizontal load grade on the horizontal bearing capacity of the belled wedge pile were analyzed as well.