竖向荷载对支盘桩水平承载性能影响的模型试验研究

Experiment Study on Model of Vertical load Affected to Horizontal Load Performances of Branch Pile

通过对仅受水平荷载和同时承受竖向荷载和水平荷载作用的支盘桩进行模型试验,研究了竖向荷载对支盘桩水平承载性状的影响。结果表明竖向荷载的存在能减小支盘桩的水平位移,减小桩侧土中的压力,降低桩身的弯矩。说明竖向荷载能提高支盘桩的水平承载力,延缓桩周土体的屈服,推迟桩身裂纹的出现,对支盘桩的承载性能是有利的。

With the model experiments conducted on the branch pile only with a horizontal load and with a vertical load and horizontal load role, the paper studied the vertical load affected to the horizontal load behavior of the branch pile. The resuhs showed that the vertical load existed could reduce the horizontal displacement of the branch pile, reduce the pressure in the soil around the pile and reduce the bending torque of the pile. Thus the vertical load could improve the horizontal loading of the branch pile, delay the yield of the soil around the pile, delay the cracking occurred on the pile and be favorable to the loading performances of the branch pile.