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| Key design techniques for highway-railway combined shield tunnels in the middle and lower reaches of the Yellow River |
| Sun Wenhao1,2, Xu Weimin3, He Yingdao1,2, Li Penglin4, Zhang Jincheng5, Zhang Liangliang1,2*
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1.China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China;
2. National-Local Joint Engineering Research Center of Underwater Tunnelling Technology, Wuhan 430063, Hubei, China;
3. Jinan City Construction Group Co., Ltd., Jinan 250014, Shandong, China;
4. China Railway 14th Bureau Group Large Shield Engineering Co., Ltd., Nanjing 211899, Jiangsu, China;
5. Communist Youth League Jinan Municipal Committee, Jinan 250021, Shandong, China |
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Abstract With the rollout of the Yellow River National Development Strategy, the demand for cross-Yellow River transportation infrastructure construction has continued to grow, and the construction and operation safety assurance of road-rail combined tunnels has been identified as a core technical challenge. In this research, a combination of model testing, numerical simulation and engineering analogy methods was adopted, and key design technologies and operation safety assurance schemes for the Jinan Jiluo Road Yellow River-Crossing Tunnel and its Northern Extension Project were systematically summarized. The results showed that: an innovative collaborative evacuation and integrated ventilation design was adopted, by which highly efficient utilization of cross-river channel resources and underground space was realized. A mechanical model for the "segment lining + internal structure" composite system was constructed, and a patented inter-ring shear-resistant structure and an integrated waterproof system for segment joints were developed, by which the safety factor of the segment lining structure was increased by 25.3%-33.6%. A quantitative correlation between segment lining damage area and flood control gate closing time was established. A prefabricated assembly scheme for tunnel internal structures was implemented, by which the construction efficiency of tunnel internal structures was improved while keeping the tunnel cross-sectional diameter under strict control. A real-time monitoring system for segment lining structures and an intelligent tunnel operation and maintenance management platform were built, by which the refined management level and traffic safety assurance capability during tunnel operation were significantly enhanced. It was concluded that the research findings could provide valuable technical reference for the design and construction of super-large diameter shield tunnel projects in the middle and lower reaches of the Yellow River, as well as similar large-scale river-crossing and sea-crossing infrastructure projects.
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Published: 12 October 2026
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