对称双斜桩基础水平承载力模型试验研究

对称双斜桩基础是斜桩基础用于建筑物(构筑物)基础的基本形式。通过桩身对竖向的倾角分别为0°,5°,10°,15°,20°的模型试验,研究水平荷载作用下对称双斜桩基础的承载力特点,并采用比例系数的方法分析了双斜桩基础承载力与双直桩基础承载力之间的比例关系。研究发现:随着桩身倾角的增加,对称双斜桩基础的水平承载力逐渐增加,但其增加幅度逐渐减小;该试验条件下,斜桩与直桩水平荷载承载能力的比例系数从0°,5°,10°,15°,20°分别为1,2.2,2.3,3.0,3.5。

Model Test on Bearing Capacity of Symmetrically Inclined Double Piles under Horizontal Load

Symmetrically inclined double-pile is a main type of inclined piles in structure’s foundation. Model tests were carried out on symmetrically inclined double piles with the pile inclinations of 0°, 5°, 10°, 15° and 20° respectively to investigate the bearing capacity characteristics. The factor of proportionality was employed to analyze the proportional relation between the bearing capacity of inclined double  piles and that of vertical double piles. The study indicates that as the pile inclination increases, the horizontal bearing capacity of inclined double  piles increases, whereas  the increasing rate slowed down gradually. Under the test conditions, when the inclination angle of inclined pile was 0°,15°,10°,15° and 20, the  horizontal bearing capacity ratio of inclined pile to vertical pile was 1, 2.2, 2.3, 3.0, 3.5, respectively.  