竖向荷载对支盘桩水平承载性能影响的模型试验研究

 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。

Model Test Study of Vertical Load to Squeezed and Branch Pile Horizontal Bearing Behaviors

Horizontal bearing behavior Test was carried out of squeezed branch and plate pile with or without vertical load was studied in this paper. The resultes indicate that the lateral displacement of pile top redeced, the pressure stress in soil of pile side decreased, the moment of the pile body reduced because of existing of the vertical load. Thoes show that the vertical load may increase the lateral bearing capacity of pile, delay the yield of soil, put off the crack of pile body. So,the existing of vertical load is useful to squeezed branch and plate pile under lateral load.