Combining the project of pile underpinning between Lijiao and Xiajiao of Line Three of Guangzhou Metro,the paper introduces the design,construction procedure and monitoring of the pile underpinning.

• 结合广州市轨道交通三号线沥-厦区间桩基托换工程实例,介绍了托换体系的设计、施工步骤和监测。