The tunnel connecting the left line from Central Park East Station to Congyansi Station in the second phase of Chongqing Rail Transit Line 9

Recently, as the "departure" 2 whole section tunnel boring machine (TBM) cutter slowly from the receiver to break rock, which means that the central park station to the smooth realization of the left line between rock temple station tunnel breakthrough, achieved after return to work and production stages in the construction of rail transit, at the same time for the second phase of line 9 promote the next phase of track-laying and other follow-up work has laid a solid foundation.

The tunnel from Central Park East Station to Congyansi Station is two separate tunnels. Two single shield TBM are used for construction. The tunneling length of the left and right lines is about 3911 meters, of which the tunneling length of the left line is 1,952 meters. Compared with traditional blasting construction, single shield TBM has advantages of high mechanization, automation, intelligence, fast construction speed, high driving accuracy, low environmental pollution and high safety, and is more suitable for urban underground engineering construction.

In order to ensure that each link is pushed forward as far as possible and get back the time, CRC group, after the resumption of work and production, carefully organizes and takes active actions to further strengthen the main responsibility, and jointly sets the target of each control node with the participants, so as to accelerate the progress of rail transit construction. Line 9 second phase of construction unit 23 - China railway bureau under the overall arrangement of orbital group overcomes the complex construction environment, as well as influencing the epidemic is difficult, more measures simultaneously, grasped the nettle and palate, construction "crack", not only developed in the process of excavation in tunnel shield tail brush replacement of new technique, effectively reduce the cost, but also to create a single tunneling shield TBM construction, 38 ring (57 meters) good grades, successfully broke the single shield TBM construction in the city, driving record of 34 rings (51 m) effectively speed up the construction progress.

The second phase of Line 9 starts from the Xingke Avenue station of Line 1. It is about 7.8km long and has five stations. The opening line, to perfect the pattern of urban rail transit network, optimize the urban function layout, alleviate the pressure of the main transportation is of great significance, not only can effectively fruitful avenue area, chongqing central park and airport garden public housing and other large-scale residential and commercial complex area, at the same time also can further encryption airport new town core area traffic, drive along the economic development, provide convenience for citizens to travel around.