On September 7, 2022, the mobilization meeting for the construction of the Haitai Yangtze River Tunnel, which was constructed and managed by the Jiangsu Provincial Communications Construction Bureau and participated by the China Railway 14th Bureau, was held on the banks of the Yangtze River in Haimen District, Nantong, Jiangsu Province, marking the longest cross-section in the world and the largest in China. The construction of the highway underwater shield tunnel officially started.

Haitai Yangtze River Tunnel

It is reported that the Haitai Yangtze River Tunnel (the part of the Haitai River Tunnel) starts from the Haimen section of Nantong, Jiangsu, of the Shanghai-Shaanxi Expressway, passes through Taicang City, Suzhou, and ends at the Suzhou-Changshu section of the Shanghai-Wuhan Expressway. It is a provincial-level key project in Jiangsu. The total length of the tunnel is 39.07 kilometers, of which the river-crossing tunnel is 11.185 kilometers long, with a design speed of 100 kilometers per hour, and is constructed with a six-lane expressway standard. The construction period of the project is 6 years and is expected to be completed in 2028.

The Haitai Yangtze River Tunnel Project is committed to creating a model landmark project in Jiangsu, a powerful country in transportation, a demonstration project of China's shield tunnel assembly construction, a milestone project in China's underwater shield tunnel construction technology, and a world-leading smart green zero-carbon tunnel classic project. The project has the characteristics of "long, large, high, deep and dangerous". The tunnel shield section is 9,315 meters long, the shield outer diameter is 16 meters, and the excavation section exceeds 16.5 meters. The construction risk of long-distance, large-diameter and high water pressure excavation Control requirements are high. In addition, the project also set up a special channel for rescue vehicles in the corridor at the bottom of the shield tunnel and the corridor in the middle of the open-cut tunnel on both sides.

The A1 tender section constructed by China Railway 14th Bureau has a total length of 945 meters, including 25 meters of Jiangbei working well, 80 meters of subsequent sections, and 840 meters of open cut section. The bidding section is located in Haimen District, Nantong. The construction site is all farmland, with good ecological environment and high environmental protection requirements.

As the highway underwater shield tunnel with the longest distance, the largest cross-section and the highest design speed in China, the Haitai Yangtze River Tunnel has always attracted much attention. The builders are committed to building the Haitai Yangtze River Tunnel into a model landmark project in Jiangsu, a powerful country in transportation, a demonstration project for China's shield tunnel assembly construction, a milestone project in China's underwater shield tunnel construction technology, and a world-leading smart green zero-carbon tunnel classic project. .

The Haitai Yangtze River Tunnel has achieved many firsts and achieved many firsts, which can be regarded as a milestone project of underwater shield tunnel technology.

World's longest highway underwater shield tunnel

The largest highway underwater shield tunnel in the country

The country's first zero-carbon tunnel

The first in the country to use a dedicated channel for rescue vehicles directly to the ground

The first in the country to adopt the section-type smoke exhaust method

The first in the country to adopt the internal structure of an integrated fully prefabricated shield tunnel

The first in the country to adopt the integrated flue board of fire prevention and structure

The first in the country to adopt a new type of anti-shedding corbel structure

The first in the country to adopt the new connection structure of DDCI

After the Haitai Yangtze River Tunnel is completed and opened to traffic, it will further strengthen the interconnection between the two sides of the Yangtze River, provide practical commuting and fast and direct inter-city travel guarantees for the joint development between the two sides of the Yangtze River, and accelerate the process of regional economic integration and integration. The national strategy for integrated development and the development of the Yangtze River Economic Belt is of great significance to enhance regional cross-river connectivity and promote the coordinated development of Shanghai-Suzhou-Connectivity. Editor/He Yuting