为深入研究季冻黄土地区桩锚支护深基坑的变位特性，通过室内缩尺模型试验对比不同工况下桩顶、桩身水平位移及坑外地表沉降的变化规律。结果表明：冻融循环过程中土体水分发生迁移重分布，存在外界补水条件会使水分迁移速率加快，使得支护结构位移与坑外地表沉降远大于开挖阶段，封闭条件冻融阶段的最大桩顶和桩身水平位移较开挖阶段增大了6 ~ 8倍，坑外地表沉降量增大了3倍；与封闭冻融条件相比，降雪条件下桩顶和桩身水平位移约增大1.4和1.2倍，坑外地表沉降量增大了1.5倍。研究结果可为此类季冻黄土地区桩锚支护深基坑施工风险防控提供参考。

In order to study the displacement characteristics of pile and anchor supporting deep foundation pit in seasonal frozen loess area, the horizontal displacement of pile top and pile body and the surface settlement outside the pit under different working conditions were compared by indoor scale model test. The results show that water migration and redistribution occur in the freeze-thaw cycle, and the existence of external water replenishment conditions will accelerate the water migration rate, which makes the displacement of supporting structure and the surface settlement outside the pit much larger than that in the excavation stage. The maximum horizontal displacement of pile top and pile body in the freeze-thaw stage under closed conditions increase by 6 ~ 8 times compared with that in the excavation stage, and the surface settlement outside the pit increases by 3 times. Compared with the closed freeze-thaw condition, the horizontal displacement of pile top and pile body increases about 1.4 and 1.2 times, and the surface settlement outside the pit increases 1.5 times. The research results can provide reference for the risk prevention and control of pile and anchor support deep foundation pit construction in this kind of seasonal freezing loess area.