Dalian Metro Line 5, Huhu Area shield between the two lines through

On August 31, the left line of Dalian Metro Line 5 between Hutan New Area station and Hutan Park Station passed smoothly, marking the smooth completion of the two lines between Hutan New Area station and Hutan Park Station.

The left line length of Huhu interval is 1,040.478 meters, and the right line length is 1,038.205 meters. This area belongs to the area of high water pressure, and it needs to pass through quartz stratum with quartz content above 90% and complex stratum with uneven geological conditions. At the same time, the tunnel goes through a series of risk sources, such as Dipo Bay Area, Bacon Kindergarten, Nameless Mountain, Tiger Beach Fun Theatre and Tiger Beach Bay, which bring great challenges to shield tunneling construction.

In order to complete the construction and production tasks with both quality and quantity guaranteed and successfully pass the major risk sources and risk points, the project Department carefully plans and scientifically organizes. On the one hand, special personnel are arranged to take turns to be on duty for 24 hours to monitor the abnormal situation. On the other hand, by constantly optimizing the construction organization scheme, strictly controlling the excavated quantity, adopting bentonite, foam and other additives to improve the residual soil, strictly controlling the synchronous grouting slurry quality, timely carrying out the second grouting, dynamically adjusting the driving parameters of shield tunneling, and other measures, the shield tunneling machine safely and smoothly through the major risk sources.