针对盾构施工过程中纠偏失效的困境，以南昌轨道交通7号线圆砾土-泥质粉砂岩复合地层中盾构严重上漂为背景，提出并实施“引孔破岩处置+掘进参数动态优化”的应急协同控制方法。该方法通过旋挖引孔清除侵入隧道的岩体，从地质层面改善掘进条件，结合施工参数动态调整，形成地质干预与过程调控一体化的应急方案。由现场监测与数值模拟结果表明： 1)引孔破岩处置技术在本工程条件下可有效扭转盾构姿态恶化趋势，盾构姿态与管片偏差纠偏速率分别达11.13 mm/环与8.7 mm/环，地表沉降控制在合理范围内； 2)该地质条件下保持刀盘转速不低于2.2 r/min,有利于盾构排渣与掘进，出渣量可作为反映盾构掘进状态、提示姿态波动的重要辅助指标。需要说明的是，该技术属于经济成本高、工艺复杂的特殊应急手段，仅适用于常规措施失效的特定工况。

A case study is conducted on the severe shield uplift of the Nanchang Metro Line 7 in composite strata of gravel soil and argillaceous rock. To address the failure of deviation correction during shield tunneling, an emergency coordinated control method termed “rotary excavation of pilot-hole for rock-breaking and dynamic optimization of tunneling parameters” is proposed and implemented. This approach involves removing the rock intruding into the tunnel through rotary excavation of pilot holes, thereby improving the tunneling conditions from a geological perspective. By integrating dynamic adjustment of tunneling parameters, an integrated emergency solution combining geological intervention and process control is achieved. Field monitoring and numerical simulation results demonstrate the following: (1) Pilot-hole rock breaking technology effectively stops the trend of shield attitude deviation, with correction rates for shield attitude and segment deviation reaching 11.13 and 8.7 mm per ring, respectively, enabling acceptable surface settlement. (2) Maintaining the cutterhead speed of no lower than 2.2 r/min facilitates mucking and tunneling under geological conditions of this project. The mucking volume can serve as an important auxiliary indicator reflecting the tunneling state and signaling attitude fluctuations. The proposed technology is a special emergency measure characterized by high economic costs and complex procedures, applicable only to specific scenarios where conventional methods have failed.