水平荷载对双斜桩基础竖向承载力影响模型试验研究

Model Test on the Effect of Horizontal Load on Vertical Bearing Capacity of Symmetrical Double Inclined Pile Foundation

通过不同倾角下对称双斜桩基础的模型试验,研究对称双斜桩基础受水平荷载和竖向荷载共同作用时其桩顶沉降及水平位移变化的曲线,分析对称双斜桩基础承载力的特点。研究发现,在相同的水平荷载作用下,随着竖向荷载的增加,桩顶沉降逐渐增加;在一定范围内,竖向承载力随水平荷载的增加而略有降低。同时可以看出,在相同的水平荷载作用下,随着竖向荷载的增加,水平位移越来越大,其结果对于对称双斜桩的理论分析、设计和在工程实践中的应用具有一定的指导意义。

Through the model test on symmetrically inclined double pile foundation at different inclinations, the changing curve of pile top settlement and horizontal displacement of symmetrical double-inclined pile foundation jointly affected by horizontal and vertical load is studied in this paper. And also the characteristics of bearing capacity of symmetrical double-inclined pile foundation are analyzed. The results indicate that the settlement of pile top increases gradually with the increase of vertical load at the same horizontal load and the vertical bearing capacity decreases slightly with the increase of horizontal load within a certain range of the vertical load. At the same time, the horizontal displacement is getting larger and larger with the increase of vertical load under the same horizontal load, which has a certain guiding significance for the theoretical analysis and design of symmetrical double inclined pile and its application in engineering practice.