为保证换乘节点施工安全，结合深圳地铁石厦站换乘节点实际情况，对可能出现的施工风险进行分析，提出应对风险的施工方案，并采用数值方法对不同施工方案进行分析比选。数值结果显示： 换乘节点开挖前注浆封闭止水，采用小导洞注浆+台阶法+临时仰拱分层、分块开挖等综合方案施作换乘节点是合理的。现场对既有结构的自动化监测数据显示，施工过程中3号线车站负2层中板最大竖向位移为5.6 mm，车站既有地下连续墙最大深层水平位移仅为0.6 mm，既有结构变形均远小于监测预警值。

In order to ensure the construction safety of the interchange node of metro station, the possible construction risks are analyzed based on the actual situation of the interchange node of Shixia Station of Shenzhen Metro, and different construction schemes are analyzed and selected by numerical method. The results show that, grouting and waterblocking before excavation of the interchange node and use the construction scheme of small guide hole grouting + step method + layering and block excavation of temporary invert are feasible. According to the automatic monitoring data of the existing structure on site, the maximum vertical displacement of the middle plate on the negative 2nd floor of metro station on Line No.3 is 5.6 mm, and the maximum deep horizontal displacement of the existing underground diaphragm wall of the station is only 0.6 mm, and the existing structural deformation is far less than the monitoring and warning value.