In order to study the subsidence characteristics caused by large diameter shield tunneling in coastal soft soil area, based on project of North Oujiang tunnel Wenzhou City, displacement field, seepage field and stress surrounding rock during construction process under fluid-solid coupling were analyzed using finite difference method. The results show that when passes through monitoring section ...

Rock mass conditions are extremely sensitive to tunnel boring machine (TBM) tunneling. Therefore, establishing a surrounding rock excavatability (SRE) classification system applicable TBM tunnels. Accurately and intelligently identifying grades can also facilitate efficient tunneling intelligent construction. Specific excavation penetration rates were used evaluate SRE. Their correlations with ...

The Jinan Jiluo Road Crossing the Yellow River Tunnel North Extension Project will intersect Queshan reservoir, which currently supplies 60% of domestic water in City. During excavation process large-diameter slurry type shield used this project, it may lead to fracturing stratum front face and blow-out from surface if support pressure is too high. leakage pollute reservoir water, safety be thr...

As the urban underground space environment gets more complex, cases of shield machines encountering and cutting through piles are becoming common. The interaction between cutter head pile foundation directly affects tunneling performance machine safety existing structure. To study machine, a calculation model force is established. A field test two was conducted rationality verified by comparing...