闲置盾构机再制造，造出产业新“蓝海”

Core Viewpoint - China State Construction Engineering Corporation's Second Engineering Bureau (CSCEC II) is experiencing order growth in the shield tunneling machine sector despite a saturated domestic infrastructure market, primarily due to its focus on remanufacturing idle shield machines and technological innovation [1][2]. Group 1: Market Context - The construction market in China is transitioning from an incremental to a stock-based era, leading to a decrease in demand for new shield machines, with over 4,000 machines already in operation and an annual demand of about 700 new machines [2]. - There are over 1,500 idle or outdated shield machines in China that could be upgraded and reused, presenting a significant opportunity for remanufacturing [2][3]. Group 2: Technological Innovation - CSCEC II has implemented advanced engineering redesign and remanufacturing technologies to revitalize old or inefficient shield machines, effectively completing over 20 remanufacturing projects within three years [5]. - The remanufacturing process includes significant technical upgrades, such as converting control systems and enhancing automation, exemplified by the introduction of an industrial-grade shield cutter change robot that improves efficiency and reduces labor dependency [6][7]. Group 3: Operational Efficiency - The shield base in Changzhou, Jiangsu, is designed to handle 8-10 remanufacturing and maintenance tasks simultaneously, optimizing resource utilization and cost control [2][3]. - The strategic location of the base allows for reduced transportation costs, facilitating operations across a 200-kilometer radius, which includes major cities like Nanjing and Ningbo [3]. Group 4: Customization and Adaptability - The remanufacturing capabilities of CSCEC II allow for significant customization of shield machines, enabling modifications within a one-meter range to meet specific geological requirements [4]. - The company has successfully upgraded a large shield machine, increasing its diameter by 0.85 meters while reusing many original components, demonstrating a commitment to sustainability and cost-effectiveness [5]. Group 5: Future Prospects - CSCEC II is collaborating with Shanghai University to establish a research base focused on shield tunneling technology, aiming to integrate smart technologies and expand applications into mining, energy, and water conservancy sectors [7].