Guided reading 

Recently，Relevant Sections of Northwest Ring of Phase II Project of Harbin Metro Line 3 Successfully Passed Completion Acceptance，It marks the countdown to the opening and trial operation of the section.。

Metro Line 3 is the largest underground rail transit project in Harbin so far.，Through the four core urban areas，Connect nearly 180 bus lines。The stratum is mainly silty clay.，Some sections pass through fine sand、Medium sand and silty clay interlayer，It also needs to pass through the first underground stacked tunnel in Northeast China.，The interval between the upper and lower tunnels is only 2.1 meter。

The company has specially developed 18 sets for the Metro Line 3 project."Ice City"Series shield machine。These shield machines have run through 23 sections successively.，The total length of excavation is over 25 kilometers.，The whole line was completed in June 2023.，During this period, the highest excavation of 36 meters per day was achieved.、Monthly maximum excavation of 350 meters，It has created a new record of shield tunneling in the cold season in Northeast China.。