盾构机掘进穿越海底基岩技术应用

Application of Shield Tunneling Technology for Crossing Seabed Bedrock

摘要:

针对我国复杂海底地质条件下，盾构机掘进穿越“海底”基岩技术应用的技术挑战与环境影响问题，依托浙江省舟山市沈家门海港“嵊泗至定海公路普陀鲁家峙至东港公路工程”实践，系统分析总结了盾构机在复杂的海底凸起基岩地层中的掘进技术经验与关键施工参数，如掘进速度、总推力、刀盘扭矩、土仓压力、注浆控制等。研究提炼了基于精准地质预判、刀具优化选型、掘进参数动态调控及注浆技术保障的核心施工技术体系。实践表明，该技术体系有效保障了施工安全，显著降低了地层扰动及环境影响，研究成果为类似复杂基岩条件下的盾构隧道设计、施工参数优化及风险控制提供了直接、有价值的参考依据。

Abstract:

In response to the technical challenges and environmental impacts of the application of shield machine tunneling through “seabed” bedrock under the complex seabed geological conditions in China, and relying on the practice of the “Shengsi to Dinghai Highway Putuo Lujiazhi to Donggang Highway Project” at Shenjiamen Seaport in Zhoushan City of Zhejiang Province, the technical experience and key construction parameters of shield machines in complex seabed uplift bedrock strata are systematically analyzed and summarized, which are tunneling speed, total thrust, cutterhead torque, soil chamber pressure and grouting control. A core construction technology system based on precise geological prediction, optimized tool selection, dynamic regulation of tunneling parameters and technical support for grouting is studied and refined. The practice shows that this technical system effectively guarantees the construction safety and significantly reduces the stratum disturbance and environmental impact. The research results provide the direct and valuable reference basis for the design, construction parameter optimization and risk control of shield tunnels under similar complex bedrock conditions.