China Railway Fourth Bid Bid Bid in the world's largest underwater road tunnel

Author:China Architecture Newspaper Time:2022.08.17

On August 15th, the TJ-02 bidding section project of Qingdao Jiaozhou Bay Tunnel project invested by the China Railway Fourth Bureau of China Railway Fourth Bureau, filled the gaps in the field of China Railway Fourth Bureau.

circuit diagram

The second tunnel of the Jiaozhou Bay of Qingdao is connected to the main urban area of Qingdao and the West Coast New District. It is an important part of the major engineering of Qingdao City and the "six horizontal nine vertical" high fast road network during the "14th Five -Year Plan" period. The main line of the project starts from the west coast of Huaihe East Road, east of Qianshan South Road intersection, crossing the Jiaozhou Bay to the east, landing near the Haibo River Estuary of Shibei District, and connecting Hangzhou Sadouc and Huanwan Road.

Effect map at the entrance of Huangdao

The project has a total length of 17.38 kilometers and a main line tunnel of 14.37 kilometers. It is equipped with two -way 6 lanes and a design speed of 80 kilometers per hour. The main line of the main line of the TJ-02 bidding section of the Fourth Bureau of China Railway is 3.44km, with a cost of 950 million yuan. The project includes 1 main tunnel on the north side, 1 C-ramp, 500 meters in the main line, 1 underground fan room in the north, and horizontal. Channel 46 meters and so on. Among them, the main line tunnel has a total length of 2.9 kilometers, the average excavation section is about 150 square meters, and the C ramp is 452 meters. All the tunnels are built in drilling method.

Northern end of the city

It is reported that the second submarine tunnel of Jiaozhou Bay in Qingdao is the largest, the longest, longest length, and the highest difficulty in the construction of the world's underwater tunnel construction. The large diameter shield is connected with the drilling tunnel sea, and the large diameter shields are undergoing world -class problems such as ultra -high water pressure. It is another important milestone in the field of benchmark engineering and engineering construction in my country's new era of traffic power.