China launches vessel with the world’s largest pile-driving capacity

The Erhang Changqing, a state-of-the-art pile-driving vessel, has embarked on its maiden journey from Nantong, Jiangsu Province, to the Hangzhou Bay Bridge construction site in Zhejiang Province. This vessel boasts the world’s tallest derrick and the highest pile-driving capacity, marking a significant advancement in China’s hydraulic engineering capabilities. Built by Shanghai Zhenhua Heavy Industries Co (ZPMC), the Erhang Changqing measures 130.5 meters in length, 40.8 meters in width, and 8.4 meters in depth. It is equipped with a 150-meter-high derrick that can install pile foundations weighing up to 700 tons and measuring 7 meters in diameter.

Innovative Engineering and Domestic Production

The *Erhang Changqing* sets a new global benchmark with its main hydraulic cylinder generating an impressive 5,000 tons of thrust. This vessel also features a high-precision positioning system that allows for centimeter-level accuracy in deep-sea piling. Previously, the record was held by the *Yihang Jinzhuang*, which had a derrick height of 142 meters. This earlier vessel was also constructed by ZPMC and delivered to China Communications Construction Co (CCCC) First Harbor Engineering Co in 2022.

Re-evaluating Gas Turbine Engines for Future Maritime Propulsion

To reduce reliance on foreign suppliers for critical components like hydraulic cylinder seals and corrosion-resistant materials, the CCCC Second Harbor Bureau has partnered with six leading domestic companies and four universities, including Tsinghua University and Tongji University. This collaboration aims to develop local alternatives for these essential parts, enhancing China’s self-sufficiency in hydraulic engineering.

China’s leadership in producing large offshore wind turbines necessitates advanced vessels like the *Erhang Changqing* for installing turbine foundations and structures. Currently, the vessel is en route to the Suzhou-Jiaxing-Ningbo High-Speed Rail and Hangzhou Bay Cross-Sea Railway Bridge construction site. It will play a vital role in major infrastructure projects, including large ports, cross-sea bridges, and offshore wind farms. With ongoing investments in research and development, China continues to strengthen its position in high-tech sectors, showcasing its commitment to engineering innovation and large-scale infrastructure development.