Xiangyang, Hubei: The first immersed tunnel on the Han River begins to float and install

　　China News Service, Xiangyang, December 12 (Hu Chuanlin, Xiang Changwen and Chen Yalin) The first immersed tube tunnel on the Han River, the Yuliangzhou River Crossing Tunnel on the east-west axis of Xiangyang, Hubei, began the floating installation of the immersed tube on the 12th.

　　This time, six immersed pipes in the east branch water area were installed for floating transportation, with a total length of 660 meters.

Four of them are 120.5 meters long and weigh more than 30,000 tons, and the other two are 86.5 meters long.

The 6-section immersed tube being installed on the float. Photo by Xiang Changwen

　　In the morning of the same day, the reporter saw at the scene that the dry dock of Dongchai had been filled with water, the immersed tube tunnel was floating on the water, and several winches were fixed above the immersed tube.

The other end of the steel cable of the hoist is fixed on the anchor pile on the river surface. Under the traction of the anchor pile and the hoist, the sinking pipe slowly moves towards the river surface.

　　According to Sun Xiaowei, the technical chief and executive manager of the Xiangyang East-West Axis Project of CCCC Second Navigation Bureau, the construction party, a total of 10 sets of anchor piles were installed in the Hanjiang River, and 8 winches were erected on the sinking pipe. The traction of the hoist and the precise positioning of the Beidou system and the precise coordination of the new ballast water system of the immersed tube tunnel strive to achieve the immersed tube at the bottom of the Han River with a deviation of less than 2 cm.

The first section of the immersed pipe slowly moves to the river surface. Photo by Xiang Changwen

　　The Yuliangzhou section of the east-west axis of Xiangyang is a fast track connecting the Dongjin New District of Xiangyang City and the old city of Fancheng. The total length is 5.4 kilometers. The tunnel structure is generally adopted. The total length of the immersed tube tunnel under the Han River is 1.01 kilometers.

After the completion of the installation and docking of the immersed pipe at the bottom of the Han River, it means that the river bottom tunnel will be initially formed. When the tunnel is connected to the shore tunnel and the construction of related auxiliary facilities is completed, the tunnel across the river will be fully connected.

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