水平竖直组合荷载作用下桩基承载特性的离心模型试验研究

Centrifugal Model Test on Bearing Capacity of Pile Foundation under Combined Horizontal Loading and Vertical Loading

通过几组离心模型试验及成果分析,研究桩基在水平荷载H、竖直荷载V组合荷载作用下的承载机理。研究结果表明:在相同位移条件下,桩基的水平承载力随着桩基施加下压荷载的增加而减小;在相同水平荷载作用下,桩头水平位移随着施加的下压荷载值增大而增大;桩基受到的下压荷载越大,桩头转角(桩身倾斜程度)越大;桩基在承受水平、竖直组合荷载作用时,二者是相互影响的,在设计过程中必须要注意水平荷载H和竖直荷载V的组合作用。

The bearing capacity mechanism of pile foundation under combined horizontal loading and vertical loading is researched through several centrifugal model tests. The results indicate that： under the same displacement, the horizontal bearing capacity of pile foundation decreases with the increase of vertical load. Under the same horizontal load, the horizontal displacement of pile head increases with the increase of vertical load. The larger the vertical load is, the bigger the inclination of pile is. When the pile foundation is under the action of combined vertical load and horizontal load, the two loads are affected by each other. The interaction of horizontal load H and vertical load V must be considered in the design of pile foundation.