Abstract：
To address the limitations of traditional utility tunnel construction methods, which involve large land use,
high labor input, complex processes and low efficiency, this study proposes the construction concept of "Shield +Pipe erecting" for utility tunnels, which deeply integrates the "shield tunnelling technology and bridge erecting technology". A U-shield pipe erecting machine for green prefabricated utility tunnels was developed accordingly. The paper first provides a detailed introduction to the U-shield pipe erecting machine′s overall design, including the design of U-shaped shield with modular structure and stepless variable diameter function, which can adapt to the construction of utility tunnels with different cross-sections, and the design of high precision pipe erecting machine with a door-type double-leg single main beam, which can control the erection error of pipes within ±5 mm. Additionally,the blinding layer paving system and the simultaneous filling system with new economical materials“quick-setting liquid soil”are introduced, which solves the problem of mechanized paving of blinding layer and synchronous filling
of side joints. Based on the utility tunnel project in Xiong′an New Area, the application of the key technologies of the U-shaped shield pipe erecting machine such as pipe erecting, blinding layer paving, side joint filling and variable cross section adaption are introduced. Compared with traditional open-cut and cast-in-place construction method,this method saves site width by 44%, improves construction efficiency by 37.5%, and has significant advantages in terms of construction safety, quality, and cost-effectiveness.
JIA Lianhui1 YAN Yangyi1 XUE Guangji1 DONG Yanping1 GONG Tingmin1 SHEN Chao2
.Design and Construction Technology of U-shaped Shield Pipe Erecting
Machine for Green Prefabricated Integrated Utility Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2025,V62(1): 275-284
2025, Vol. 62 