Jinping-Ⅱ, the homemade self-elevating leveling barge for gravel paving, was launched in Nantong Manufacturing Base of ZPMC Shanghai Zhenhua Heavy Industries Co Ltd on April 9. The leveling barge will be operated in the construction of the Shenzhen-Zhongshan Bridge when it sails to Guangdong in three months, which will lay a solid foundation for the laying of the first tube of the world's widest immersed channel.
The construction site of the Shenzhen-Zhongshan Bridge, as seen on March 13, 2019. [Photo/Xinhua]
With a length of 6.8 kilometers, which includes a 5.035-km-meter-long immersed tube, and a width of 46 meters, the two-way eight-lane tunnel will be the largest and widest in the world upon completion. Its tunnel will be 1.2 meters longer and two lanes wider than the Hong Kong-Zhuhai-Macao Bridge. The construction of the Shenzhen-Zhongshan Bridge started on Dec 29, 2016, and it is expected to come into operation in 2024. It will be the world's first eight-lane tunnel under the sea, and its maximum designed speed is 100 km/h.
Jinping-Ⅱ, developed by crane maker ZPMC Shanghai Zhenhua Heavy Industries Co Ltd, is the world’s largest and most advanced self-elevating leveling barge for gravel paving. [Photo by Yue Lujian/cnr.cn]
The gravel leveling of the foundation trench plays a key role during the construction process, and the leveling barge for gravel paving is a guarantee for the quality of the immersed tube tunnel, according to Li Jin, deputy chief engineer of the project.
The location of the Shenzhen-Zhongshan Bridge. [Photo/pprd.org.cn]
Jinping-Ⅱis 98.7 meters long and 63.3 meters wide, the size of a football field, and was specially designed for the construction of the Shenzhen-Zhongshan Bridge. It is a large and special piece of equipment with multiple functions covering positioning measurement, underwater riprap, shallow-water leveling, and quality inspection. The leveling barge has been described as a “3D printer” for deep-water gravel paving.
Started in July 2018, Jinping-Ⅱ is expected to be put into use in July to engage in the construction of the Shenzhen-Zhongshan Bridge.