On August 26, 2025, in accordance with the "Shanghai Science and Technology Award Regulations", 206 Shanghai Science and Technology Awards were awarded in 2024 after being reviewed by the Shanghai Science and Technology Award Evaluation Committee, approved by the Shanghai Science and Technology Award Committee, and approved by the Shanghai Municipal People's Government. The "Key Technology Innovation and Engineering Application of Steel Structure Wind Power Towers" project, in which Jiangsu Jinhai New Energy Technology Co., Ltd. participated, successfully won the "Shanghai Science and Technology Progress Award".

The project was submitted by six units including Jiangsu Jinhai New Energy Technology Co., Ltd. of Jinhai Group, Tongji University, and Tongji University Architectural Design and Research Institute (Group) Co., Ltd; Professors He Minjuan and Ma Renle from Tongji University, Huang Zhangyu, General Manager of Jinhai Corporation, He Guirong and Qiu Keyi from Tongji University Architectural Design and Research Institute (Group) Co., Ltd. jointly participated in and were responsible for the research and development work of the project.

The project focuses on the key bottleneck problem of steel structure wind power towers. The project team has spent nearly 20 years researching and engineering practice to form a series of theories and technologies, and has obtained domestic and foreign patents and certifications. The overall technology has reached international advanced level. The main technological innovations are:

(1) Reverse balanced flange bolt connection technology. A reverse balanced flange connection technology has been developed to address the fatigue resistance problem of large-diameter steel pipe splicing nodes in wind power towers under continuous dynamic loads. An equivalent bending bearing capacity design method for splicing nodes has been proposed, achieving efficient fatigue resistance connection of large-diameter steel pipe structures in wind power towers.

(2) Frame type prestressed anti fatigue steel pipe wind turbine tower structure. In response to the demand for building large megawatt wind power towers in low wind speed areas, a framework type prestressed anti fatigue steel tube wind power tower structural system was developed. A fatigue damage evolution model of the framework type wind power tower under the prestressed anti fatigue strategy was established, and a multi-scale collaborative optimization design method for the framework type wind power tower was proposed, which systematically solved the technical problem of building large megawatt wind power towers in low wind speed areas.

(3) The prestressed anchor bolt foundation of the beam slab filled with polystyrene board in the center. Aiming at the problems of excessive stress, dynamic fatigue, and easy overturning of wind turbine tower foundations, a prestressed anchor bolt foundation with a center filled polystyrene board was developed. A full life damage warning model for prestressed anchor bolt foundations was established, and a foundation design method considering the joint action of the foundation was proposed, effectively solving the technical problems of anti overturning and anti fatigue cracking of wind turbine foundations.

(4) Replaceable prestressed anchor bolt technology. A replaceable prestressed anchor bolt technology has been developed to address the issue of foundation anchor bolt breakage that cannot be replaced. A design theory for dynamic fatigue cracking of wind tower foundation structures has been proposed, and a construction and installation technology for replaceable prestressed anchor bolts has been proposed, achieving safe operation of wind power tower structures throughout their entire life cycle and reliable connection with the foundation.

Jinhai Jiangsu Jinhai New Energy Technology Co., Ltd. has made significant contributions to the main technological innovation points (1) and (4) of this project.

Figure 2 Reverse Balance Flange Connection Technology

Figure 3: Technology of replaceable prestressed anchor bolts

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