复杂地层三模盾构带压开仓刀具检换施工安全风险管控OA

To address the technical challenges of pressure maintenance and high water ingress risk in subsea marine sedimentary layers,sandstone,and other complex strata,this study proposed a comprehensive treatment scheme:"pre-grouting reinforcement+shield tail ring grouting+bentonite mud cake formation".The paper systematically elaborated on the technical characteristics,process principles,construction procedures,and key control measures for pressurized open-cabin tool inspection and replacement of triple-mode shield tunneling in subsea tunnels.By combining a case study of a new energy power generation subsea drainage tunnel project,the advantages of this technology were validated in terms of safety,reliability,construction efficiency,and cost-effectiveness,providing a reference for similar subsea complex strata shield tunneling operations with pressurized open-cabin requirements.