Abstract:To address the urgent and difficult challenging encountered during the construction of deep underground pipelines in old urban areas, such as “inability to move” for traffic diversion, “inability to touch” for underground utilities, and “inability to disturb” for the surrounding environment, focusing on reducing the number of new shaft constructions, the construction process of the set of sharp curve shield is specially proposed. A complete system is formed from four aspects of equipment, materials, technologies and surveying, which can alleviate the aforementioned challenges. The technique is successfully applied to main interception pipeline of Taopu Wastewater Treatment Plant Initial Rainwater Storage Project Section TP1.4 (Meichuan Road - Zhongjiang Road, Zhongjiang Road - Meilin North Road, and Meilin North Road - Lianxi Road turning sections), effectively overcoming the difficulties associated with shield tunneling along sharp curves, and shortening the project duration, reducing costs, and minimizing environmental disruption, which not only provides a new approach for the step-by-step and layer-by-layer construction of the “points”, “lines” and “networks” of the deep underground pipe network in the old urban area, but also offers new ideas for the development of municipal facilities towards the pipe network of the deep underground space of the city.
