Piles under the bottom of a pit are always subject to deflection due to excavation-induced soil movement on soft foundation.
软弱地基开挖，流动土体对坑内桩基推挤，导致桩基偏位；
When confined aquifer under the bottom of the pit, the foundation excavation will reduce the thickness of overlying impermeable layer.
在基坑底部以下存在承压水层的情况下，基坑开挖减少含水层上覆不透水层的厚度。
When confined aquifer under the bottom of the pit, the foundation excavation will reduce the thickness of overlying impermeable layer.
在基坑底部以下存在承压水层的情况下，基坑开挖减少含水层上覆不透水层的厚度。
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