The shield tunnel section of the north extension project of Nanjing Metro Line 1 has been connected with two lines

On May 27, nanjing metro line 1 north extension engineering swallow rocky mountain ~ round bottomed basket stand right line tunnel shield interval smoothly, so far, the nanjing metro line 1 across the north extension project of shield interval is realized, laid a solid foundation for line opened, for development of nanjing urban rail transit construction and urban write new footnote.

The northern extension project of Line 1 starts from Maigao Bridge station and ends at Erqiao Park Station. The total length of the line is 6.54 km, including 6.04 km underground line and 0.5 km elevated line, with 5 stations. The section between Yanziji station and Watoushan Station, which has successfully completed the right line connection, is 1.1km in length, of which the left line is 1132.443 meters long, the right line is 1107.387 meters long, and the minimum plane curve radius is 350 meters. The geological conditions of the section are complex, and it is difficult to construct because it passes through many buildings, rivers, municipal roads and other major risk sources.

Since the commencement of construction, Nanjing Metro has always been guided by progress goals, guaranteed by safety and quality, promoted by "strict" and "strict" security. In order to ensure the safety of the shield machine through many risk sources, the monitoring and measuring process of the tunnel is strictly implemented, the tunneling method is continuously optimized, the tunneling speed, soil pressure balance and shield attitude are strictly controlled, the soil disturbance is reduced, and the synchronous grouting is strengthened in the corresponding area according to the monitoring situation. At the same time, adhere to the implementation of the division of responsibilities, through pre-class speech, on-site disclosure and other measures, constantly strengthen the training and education of the field operation personnel, strictly implement the critical plan before the construction of the condition verification system, effectively ensure the rapid and safe progress of the preparation work of shield tunneling. In the specific implementation of the project to promote, adhere to do a ruler to measure to the end, biting all kinds of "hard bones".

Since October 5, 2021, when the shield tunneling on the right line from Yanziji to Watoushan station started, after 234 days and nights of continuous excavation, Successively implemented as scheduled yan ~ its interval of the left line of shield smooth round bottomed basket, from mountain station main body comprehensive caps, swallow line moved to complete, swallow Los Angeles stop second phase of pile foundation construction completed, swallow angeles station received well the main structure and caps, yan ~ its penetration, swallow angeles stands the main structure of the left line of interval full back, and finally realizes the double well versed in major nodes such as time limit for a project, Successfully completed all the shield tunneling construction tasks undertaken by the project.