On June 4, as the cutterhead of the "Tiedun No. 8" shield machine steadily ground through the retaining piles at Xuefu Street East Entrance Station and precisely entered the steel ring of the receiving portal, all shield-driven sections of Section 107 of Taiyuan Rail Transit Line 1, jointly invested and constructed by China Railway Construction Investment Group and participated in by China Railway 22nd Bureau Group, achieved full breakthrough.

The construction task for this section includes three stations and three running tunnels, with a total line length of approximately 3.193 km, of which the shield-driven section is about 2.227 km long. A 6.44-meter-class earth pressure balance shield machine was used, advancing in reverse from Zhongxin Street East Station, sequentially passing through Taiyuan South Station and Shanxi Academy of Agricultural Sciences Station in empty-push mode, and completing reception at Xuefu Street East Entrance Station.

During construction, faced with numerous challenges such as crossing hazard sources and empty-push passage through stations, the construction team convened multiple expert demonstration meetings to overcome difficulties and deploy and advance the work. Among these, the empty-push passage of the shield through Taiyuan South Station was a key and difficult part of the construction. The empty-push curved section is 40 meters long, the narrowest point of the passage is 6.85 meters, and the closest distance between the shield body and the tunnel wall is only 5 centimeters. Due to the narrow site, lifting equipment could not be used, and all processes could only rely on manual work. The technical personnel creatively applied the construction technique of "first disassembly, then bypass flow, then reassembly," efficiently solving the installation difficulties of the reaction frame and launching cradle in the enclosed space. It took only 7 days, 3.5 times more efficient than traditional methods.

The smooth breakthrough of Section 107 provides strong support for advancing subsequent track-laying works, electromechanical works, decoration and finishing works, and lays a solid foundation for achieving the goal of opening to traffic on schedule.