Core Viewpoint - The article highlights the significance of a unique underground power cable tunnel in Jinan, which utilizes shield tunneling technology to ensure reliable electricity supply to the city's core cultural and commercial areas, particularly under Daming Lake [2][3][4]. Group 1: Tunnel Description and Importance - The tunnel, located 28 meters beneath Daming Lake, spans approximately 600 meters and contains two 220 kV and four 110 kV power cables, serving as the "energy underground blood vessel" for the city [3][4]. - This is the first shield tunneling power cable tunnel in Shandong Province, representing a significant engineering achievement that avoids visual pollution and safety risks associated with overhead power lines [4][5]. Group 2: Operational Insights - The power cable tunnel is monitored by a team that conducts regular inspections to ensure the safety and functionality of the cables, utilizing advanced monitoring equipment to track environmental conditions and cable temperatures [6][8]. - The inspection process has evolved from manual checks to incorporating intelligent technologies, such as drones and robotic systems, which enhance efficiency and safety during inspections [8][9]. Group 3: Community Impact - The tunnel plays a crucial role in providing uninterrupted power supply to the surrounding communities and commercial areas, ensuring that events and activities, such as the vibrant night scenes at Daming Lake and the bustling business on Quancheng Road, can continue without disruption [6][9].

Core Viewpoint - The "Wanmei Electric Power" shield tunneling machine has been launched in Guangzhou and will be utilized in the State Grid's Wuhu GIL (Gas Insulated Transmission Line) corridor project crossing the Yangtze River [1][3]. Group 1: Project Overview - The Wuhu GIL corridor project, located in Wuhu City, Anhui Province, is a crucial part of the Gansu-Zhejiang ±800 kV UHVDC transmission project, featuring a total tunnel length of 3,600 meters, making it the largest power corridor project under construction in terms of diameter in inland areas [3][5]. - The underground pipeline installation method, as opposed to an elevated ground solution, efficiently saves space, does not interfere with Yangtze River navigation, and ensures transmission stability unaffected by terrain and weather [3]. Group 2: Technical Specifications - The "Wanmei Electric Power" shield tunneling machine has a cutter head diameter of 12.13 meters, a total length of 150 meters, and a weight of 2,300 tons, with a total power of 6,900 kW and 116 cutter tools, including 72 replaceable tools for normal pressure [5]. - The machine is equipped with advanced technologies for tunneling through complex geological conditions, including interchangeable normal pressure rolling cutters, main drive telescoping, and synchronous double-liquid grouting [5]. - Intelligent control systems for tunneling posture, cutter wear detection, and advanced geological forecasting are integrated to ensure safe and efficient tunneling operations [5]. Group 3: Project Timeline and Impact - After factory manufacturing, the shield machine will be disassembled and transported to the construction site via water and land, with assembly and testing expected to begin, aiming for tunneling to commence by the end of March 2026 [7]. - This tunnel represents the most geologically complex and challenging power shield tunnel currently under construction on the Yangtze River, and its completion will effectively address cross-river transmission challenges, enhancing the power exchange capacity and reliability of the East China power grid [7].

Core Insights - The event "New Tian Gong Kai Wu - Technology Achievements Release Conference" focused on breakthroughs in China's shield tunneling technology, showcasing innovations by China Railway Construction Heavy Industry Co., Ltd. and China Railway 14th Bureau Group Co., Ltd. [1][3] - The "Jinghua" is the first domestically produced 16-meter ultra-large diameter shield machine, marking a significant advancement in China's tunneling industry towards intelligent technology. [1] - Over the past 30 years, China's shield tunneling technology has transitioned from reliance on imports to independent innovation, with large diameter shield machines being crucial for major infrastructure projects. [1] Company Developments - China Railway Construction Heavy Industry has developed advanced geological forecasting and intelligent tunneling systems, enhancing the operational capabilities of domestic shield machines. [1] - China Railway 14th Bureau successfully executed a "millimeter-level crossing" during the construction of the Qinghuayuan tunnel, maintaining ground subsidence within 1 millimeter, ensuring the safety of urban metro operations. [3] - The company implemented a unique four-part micro-subsidence control technology to address safety challenges in complex geological conditions during shield tunneling. [3] Industry Trends - The shield tunneling industry in China is entering an era of intelligent technology, reflecting a broader trend towards modernization and efficiency in construction practices. [1] - The development of ultra-large diameter shield machines positions China at the high point of the global underground engineering equipment industry chain and value chain. [1] - The ongoing digital exhibition "New Tian Gong Kai Wu - Technology Achievements Exhibition (First Phase)" highlights various technological achievements, including advancements in open-source technology and new energy storage. [3]