Ren Min Ri Bao·2025-05-13 22:11Core Viewpoint - The article highlights the advancements in China's shield tunneling technology, showcasing the development of various types of shield machines capable of multi-directional excavation, which enhances efficiency and expands application scenarios in infrastructure projects. Group 1: Innovations in Shield Machines - The "Pati Galang" shield machine, with a diameter of 15.7 meters, is set to be exported to Australia, marking it as China's largest diameter shield machine for export [1] - The "Linghang" shield machine operates with a "manned supervision, unmanned operation" approach, demonstrating advanced automation in tunneling [1][15] - The "Yongning" shield machine is the world's first large-diameter machine capable of climbing steep slopes, achieving a maximum monthly excavation of 332 meters and a daily record of 22.75 meters [4] Group 2: New Excavation Directions - Shield machines can now perform various excavation directions, including horizontal, vertical, and inclined digging, which were previously limited to horizontal operations [2][3] - The "Zhongtie 1285" machine has successfully completed tasks involving long-distance downhill excavation at a 15-degree angle, showcasing its capability to navigate complex geological conditions [5] Group 3: Expanding Applications - The use of shield machines is expanding beyond traditional transportation infrastructure to include water conservancy, hydropower, mining, urban utility tunnels, and parking garages [8] - The "Dream" shield machine is being used for vertical excavation in a smart underground parking project in Shanghai, validating the feasibility of vertical tunneling methods [6] Group 4: Technological Advancements - Each new shield machine represents significant technological innovations, such as the "Yongning" machine's climbing mechanism inspired by the structure of a mountain-climbing tiger [9] - The "Zhongtie 1361" machine employs innovative designs for vertical drilling, achieving a single-pass excavation of a 7-meter diameter shaft to a depth of 311 meters [7] Group 5: Market Trends and Demand - The demand for larger diameter shield machines is driven by the need for more efficient underground space utilization, allowing for multi-functional installations within a single tunnel [12] - The advantages of large-diameter tunnels include reduced construction costs and minimized environmental impact compared to traditional bridge solutions [12] Group 6: Challenges in Manufacturing - The manufacturing of shield machines with diameters exceeding 15 meters presents significant challenges, including increased geological risks and the need for advanced materials and designs [13] - The development of the first domestically produced 15-meter shield machine in 2017 marked a significant milestone in breaking foreign monopolies in this technology [13] Group 7: Future Directions - The industry is focusing on making shield machines smarter and greener, with the "Zhongtie 1237" being the world's first green shield machine, which has been recognized internationally [16] - Future efforts will concentrate on achieving larger diameters, faster speeds, and deeper excavations while enhancing the overall technology of shield machines [16]