On November 30, at the launch site of the shield tunneling machine for the section between Longcheng Street East Station and Wusu Airport Station on Taiyuan Rail Transit Line 1, accompanied by the rotating sound of the cutterhead, the "Fenjin No. 1" shield tunneling machine with an excavation diameter of 6.4 meters slowly started, marking another phased progress in the Taiyuan Rail Transit Line 1 project.

The shield tunneling section between Longcheng Street East Station and Wusu Airport Station launched this time is the longest shield tunneling section of Taiyuan Rail Transit Line 1, and the launch site is located at the ventilation shaft in the middle of the section. In view of the limitations of the launch site, some trailers of the shield tunneling machine were placed on the ground. Through trailer transfer, the shield tunneling machine equipment was properly connected and excavated, and then split launching was carried out.

The "Fenjin No. 1" shield tunneling machine was specially designed and manufactured for Taiyuan's soft soil, sandy, water-rich strata. CRCC Heavy Industry, a professional shield tunneling machine manufacturer with advanced and mature technology, was selected as the technical support party to create Shanxi's own shield tunneling brand. The shield tunneling machine has a total length of 84 meters and a total weight of 480 tons. It adopts variable-frequency electric motor drive and can adapt to a minimum horizontal curve radius of 250 meters, a minimum vertical curve radius of 1,000 meters, and a maximum gradient of 40‰. The cutterhead adopts a spoke type with high reliability, ensuring construction efficiency and construction safety. The design of important parts of "Fenjin No. 1", such as mechanical, electrical, and hydraulic parts, is more reasonable, the structure is more optimized, the configuration is more advanced, and safety and reliability are higher. Compared with previous shield tunneling machines, it minimizes material consumption during shield tunneling and saves costs for the project.

During the shield tunneling construction of this section, it will pass beneath risk sources such as Malianying Bridge and the South Ring Expressway. Before crossing, the construction team conducted a detailed investigation of the risk sources and formulated feasible plans through process innovation, technological innovation, and optimization of construction organization, so as to ensure that the impact of shield tunneling on existing buildings and structures is minimized and to ensure safe and efficient construction.

It is reported that during the construction process, the construction team made full use of BIM technology, the smart construction site platform, and the VR system to comprehensively improve the automation and informatization level of project management, continuously realize smart management and intelligent construction, visualize construction parameters, and effectively promote the informatization reform process of subway construction.