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对称双斜桩基础是斜桩基础用于建(构)筑物的基本基础形式。通过对桩身竖向倾角分别为0°、5°、10°、15°和20°的对称双斜桩基础模型试验,研究竖向荷载作用下对称双斜桩基础的承载特点。研究发现,对称双斜桩基础在竖向荷载作用下,随着桩身倾角的增加,当桩身对竖向的倾角在5°～10°时,其竖向承载力比直桩基础大,当桩身对竖向的倾角超过10°时,其竖向承载力随桩身倾角的增加逐渐减小,并小于直桩基础的承载力;根据该模型试验,对称双斜桩基础当桩身对竖向的倾角在5°～10°内是最优的。
Symmetrical double-inclined pile foundation is inclined foundation pile foundation (building) basic basic form. The load-bearing characteristics of symmetrical double-inclined pile foundations under vertical load are studied through the foundation model tests of symmetrical double-inclined piles with vertical inclination of 0 °, 5 °, 10 °, 15 ° and 20 ° respectively. The results show that under the vertical load, the vertical bearing capacity of the symmetrical double-inclined pile foundation is larger than that of the straight pile foundation when the inclination angle of the pile body to the vertical is between 5 ° and 10 ° with the increase of the pile inclination angle. When the vertical inclination of the pile body exceeds 10 °, the vertical bearing capacity of the pile body decreases with the increase of the pile body inclination angle and is smaller than the bearing capacity of the straight pile foundation. According to this model test, Vertical inclination of 5 ° to 10 ° is the best.