Abstract:In response to the transition demand of urban rail transit construction from “scale expansion” to “quality enhancement” in China, taking the Shenzhen Metro Line 22 Project as an example, the full-life-cycle economic efficiency, key construction technology systems, and comprehensive benefits of prefabricated metro stations are comprehensively discussed, By comparing and analyzing a quantitative data of fully-prefabricated stations and stacked prefabricated stations as well as traditional cast-in-situ mode in terms of budget estimates, construction period, labor, materials, and environmental performance, and combined with the engineering practices of core technologies such as high-precision measurement positioning, intelligent posture-adjusting platforms and gantry cranes, the advantages and disadvantages of this model are systematically analyzed. The results indicate that although the initial construction and installation costs of prefabricated stations are higher, the construction schedule can be significantly shortened, the on-site labor demand and material consumption are drastically reduced, and the construction waste and carbon emissions are reduced, demonstrating the excellent green construction and comprehensive benefits. The successful implementation of the project relies on the deep integration of intelligent construction technology and whole-process integrated management. As the technology becomes widespread and the industrial chain matures, the prefabricated construction will become an important path for promoting the high-quality development of urban rail transit.
