In recent years, Offshore Wind Power (OWP) has gained prominence in China’s national energy strategy. However, the levelized cost of electricity (LCoE) of wind power must be further reduced to match the average wholesale price. The cost-cutting and revenue-generating potential of offshore wind generation depends on technological innovation. The most recent studies and applications of offshore wind technology are thoroughly examined. (1) Techniques for site selection, such as site surveys, wind resource assessments, and environmental factors, are reviewed. (2) Three main technical components in offshore wind farms are discussed, including wind turbine, foundations, and booster stations. (3) The state-of-the-art method of the offshore wind farm’s construction and operation and maintenance (O&M) practices is discussed. In situ marine geological surveying, large-scale offshore wind turbine manufacturing, integrated structural design, floating foundation design, flexible DC transmission technology, shortage of specialized vessels and equipment for construction, intelligence of O&M, and other issues are challenging China’s OWP industry. A brief overview of China’s efforts in standardization, parity, and research and development are discussed. Recommendations for future development of the wind power industry are provided for China, which may be referable for other nations with comparable circumstances.

This paper shares the experience of China Three Gorges Corporation in intelligent grouting management for dam foundation reinforcement. An intelligent grouting control system called intelligent grout control hub with intelligent management (iGHM) was introduced to realize one-button closed-loop intelligent control of cement grouting by its robust grouting control models, novel grouting facilities, and intelligent online monitoring approaches. In this system, the grouting period (t) is intelligently divided into three zones and five phases based on the product of grouting pressure (P) and unit grouting rate (Q), which provide quantitative criteria for the grouting process control. Innovative grouting facilities (e.g., intelligent non-grading slurry tank, intelligent pressure control system, and central hub for grouting data management) and an intelligent grouting management cloud platform are subsequently incorporated to monitor, analyze, and evaluate grouting data online for efficient digital grouting management. Its application of consolidation grouting and high-pressure curtain grouting at the Baihetan Hydropower Station demonstrates that this intelligent grouting system could improve grouting quality with promising applications in similar projects.

白鹤滩水电站地下厂房基本对称布置在金沙江下游高山峡谷河段左右岸的玄武岩山体内, 各安装8台单机1,000 MW的水轮发电机组, 其单机容量、总装机容量、主厂房跨度(34 m)、穹顶型尾调室直径(最大48 m)及地下洞室群规模均居世界地下厂房之首. 厂房洞室群布置复杂、相互关联、挖空率高, 位于以水平构造应力为主的高地应力区, 围岩隐裂隙发育、坚硬性脆、起裂强度低, 局部发育柱状节理玄武岩, 多处围岩被长大软弱缓倾角错动带切割, 洞室群开挖施工的安全稳定面临严峻挑战. 针对高地应力环境下白鹤滩地下厂房脆硬玄武岩内部破裂、错动带不连续变形、洞室群围岩时空变形联动效应的响应特征和演化规律, 遵循地下厂房洞室群“认识围岩、利用围岩、保护围岩、监测围岩、反馈优化”的建设思路和“开挖一层、分析一层，预测一层，验收一层”的工作程序, 提出了“超前预控制、垂直薄分层、平面细分区、进尺短步长、爆破精细严、快速强支护、全程勤量测、数据快反馈、动态反演优化”的玄武岩洞室群围岩时空变形调控全过程施工技术, 确保了白鹤滩地下厂房的安全优质有序建设，促进了中国水电工程建设技术进步, 对同类工程具有指导意义.

It is imperative to understand the spatial and temporal coordination deformation mechanism and develop targeted deformation control technologies for high sidewall — bottom transfixion (HSBT) zones to guarantee the stability of rock surrounding underground hydro-powerhouses under complex geological conditions. In this study, the spatial and temporal coordinated deformation control of HSBT zones was addressed from the aspects of the deformation mechanism, failure characteristics, and control requirements, and some coordinated deformation control technologies were proposed. On this basis, a case study was conducted on the deformation control of the HSBT zone of the underground powerhouse at the Wudongde hydropower station, China. The results showed that the relationship between excavation and support, and the mismatch of deformation and support of the surrounding rock mass in the HSBT zone of underground caverns with a large span and high in-situ stress can be appropriately handled. The solution requires proper excavation and construction procedures, fine blasting control, composite and timely support, and real-time monitoring and dynamic feedback. The technologies proposed in this study will ensure the safe, high-quality, and orderly construction of the Baihetan and Wudongde underground caverns, and can be applied to other similar projects.

Thermal cracking is an inevitable phenomenon in concrete dam construction. In this study, we develop a set of control technologies for concrete dam constru