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因受周边复杂环境的限制,人民路越江隧道浦东风井修建在已建成的圆形隧道上,然后在风井底板和隧道之间施工5个风口,完成隧道的通风系统。然而风口开挖中如何确保已建结构的正常使用,是施工中必须解决的关键问题。通过MIDAS-GTS软件,建立了隧道、风井结构及周边土体的三维有限元数值模型,对隧道管片、风井底板及已施工风口内衬结构受力变形进行了详细的分析,为风口开挖对周边环境的影响提供了理论依据,验证了该施工方案的可靠性。同时通过现场监测,验证了数值模拟的计算结果,为同类工程建设提供依据。
Due to the complexity of the surrounding environment, the Pudong Fengjing of the Renmin Road Crossing River Tunnel was built on a completed circular tunnel. Five tuyres were then constructed between the bottom of the wind shaft and the tunnel to complete the tunnel ventilation system. However, how to ensure the normal use of the constructed structure during the tuyere excavation is the key problem that must be solved in the construction. Through the MIDAS-GTS software, the three-dimensional finite element numerical model of tunnel, wind well structure and surrounding soil is established. The stress and deformation of the tunnel segment, the shaft bottom plate and the construction tuyere lining are analyzed in detail. Excavation of the impact on the surrounding environment provides a theoretical basis to verify the reliability of the construction program. At the same time, the results of numerical simulation are verified through on-site monitoring, which provides the basis for the construction of similar projects.