为确保济南市轨道交通R1号线大杨站盾构顺利接收及上方管线安全，提出复杂地质条件下土压平衡盾构水下接收方案，阐述垂直冻结加固、洞门凿除、挡墙及板下临时支撑施作、盾构掘进模式及掘进参数控制、同步注浆及补强注浆、外凸式洞门设计等水下接收技术。主要结论如下： 1）在巨厚富水卵石层中盾构接收情况下，常规加固措施无法保证加固效果时，建议采用水下接收方式； 2）优化洞门凿除工序，视情况分层分块凿除，降低洞门凿除的风险； 3）采用不同的掘进模式，保证土压平衡盾构水下接收的顺利实施； 4）外凸式洞门后浇环梁设计可减小洞门永久封堵的施工风险； 5）整个接收阶段管线最大沉降变形仅1.41 mm，采用水下接收技术能保证富水卵石层中土压平衡盾构的安全接收。

In order to guarantee the successful receiving of shield in Dayang Station on Jinan Rail Trainsit Line R1 and the safety of the upper pipelines, an underwater receiving scheme for EPB shield under complex geological conditions is put forward; and the underwater shield receiving technologies, including vertical freezing consolidation, portal cutting, retaining wall and temporary support under plate, shield tunneling mode and parameter control, synchronous grouting and supplementary grouting and outer convex portal design, are described in detail. Some conclusions are drawn as follows: (1) The underwater shield receiving technology is recommended in extremely thick waterrich gravel stratum, in which the conventional reinforcement cannot work. (2) The portal cutting process should be optimized to reduce the construction risk. (3) By using different tunneling mode of shield, the successful underwater shield receiving can be successfully carried out. (4) The outer convex portal can avoid the risk of sealed one. (5) The deformation of the upper pipeline, 1.41 mm, shows that the abovementioned underwater shield receiving technology is feasible and rational.