The shield tunneling sections of the Pudong section of Shanghai Metro Line 22 (Chongming Line) have all been completed

On September 14th, the double-track shield tunneling of the Lingkong North Road Station - Gaoling Middle Ventilation Shaft section and the vehicle depot entry and exit Line - Lingkong North Road Station section of the 105th contract of the first phase of Shanghai Metro Line 22 (Chongming Line) was successfully completed. This marks the full completion of the shield tunneling sections of the Pudong section of Line 22 (Chongming Line), laying a solid foundation for the early operation of the entire line.

Since the first shield machine was launched in June 2024, relying on the autonomous axis driving system and risk control platform, real-time monitoring of tunneling parameters, equipment status and surface settlement data has been carried out, and the construction plan has been dynamically adjusted. The section between Lingkong North Road Station and Gaoling Middle Air Shaft started from Lingkong North Road Station to the west and took 373 days to achieve double-track connection on July 5, 2025. The shield tunnel section of the Dongjing Road Vehicle Depot's entry and exit line started from the shield shaft of the entry and exit line to the east. It took 201 days and the double-line connection was achieved on September 14, 2025. The double-track breakthrough of the shield tunnel section of the Dongjing Road Vehicle Depot entry and exit Line marks the full breakthrough of the shield tunnel section of the Pudong section of Line 22 (Chongming Line).

The shield tunnel section is confronted with conditions such as steep slopes, shallow soil cover starting, crossing confined water layers, the Pudong Canal, and underground pipelines. These conditions impose strict requirements on construction accuracy and safety risk control, presenting significant challenges. The First Branch of the Construction Group, in collaboration with all participating construction units, conducts real-time monitoring and analysis of data, precisely controls the tunneling parameters and posture of the shield machine, and ensures the smooth advancement of the shield machine in complex geological conditions. In response to risks such as ground subsidence and pipeline damage, emergency response plans were formulated. A series of expert consultation meetings, work deployment meetings and risk source training sessions for shield construction were held. Emergency drills for shield tunneling through confined water layers and fire emergency drills were organized. External experts were invited to the site for guidance on multiple occasions. Communication and coordination with relevant departments were strengthened to minimize the impact of construction on the surrounding environment.

Subsequently, the First Branch of the Construction Group will continue to maintain a high fighting spirit and a rigorous working attitude, spare no effort to advance the remaining construction projects, and ensure that all key node targets can be completed on time and with high quality.