常州多条主干道的围挡，隔开了一道独特的风景线：围挡之外车流如织，围挡之内却是一片井然有序的 攻坚场景。工人们在全神贯注地进行管线对接与回填，一切忙碌都在尽可能低的声响中高效运转——这 是地铁5号线管线迁改施工最后的攻坚场景。近日，记者从常州地铁集团获悉，当前，地铁5号线全线管 线迁改施工及道路疏解工程基本完成，土建施工全面铺开，20座车站已进入主体施工阶段，标志着这条 贯穿常州主城区的地铁线路建设迈出了关键一步。 施工现场 "先头部队"攻坚战，城市"生命线"重新安家 管线迁改，被称作地铁建设的"先头部队"。它并非简单的"挖沟埋管"，而是一项为城市地下错综复杂 的"生命线"重新规划居所的系统工程。纵横交错的地下世界里，燃气管道输送着"厨房能量"，自来水管 道滋养着日常起居，电力电缆点亮万家灯火，雨水污水管道则默默维系着城市的"新陈代谢"。当地铁需 要在地下开辟"专属通道"时，其线路难免与这些既有的重要管线"狭路相逢"。为保障地铁施工安全，同 时确保城市运转不受影响，必须在主体工程开工前，通过科学规划与精细施工，将这些管线安全迁移至 新位置。 位于城市主干道兼景观大道——通江路上的万福桥站，其施工牵动着市民的心， ...

（原标题：波哥大地铁一号线第二批赴华培训工程师学成归来） 据波哥大市政府网站12月12日报道，39名波哥大地铁一号线"青年人才计划"二期学员在赴华完成系 统培训后返回波哥大，将参与地铁一号线的建设与运营工作。相关培训由中方企业组织实施，涵盖电 气、机械、自动化、通信等多个工程领域。学员在中国西安接受了约15个月的地铁系统建设与运营培 训，并参与了多项实践环节。中企项目公司表示，参训工程师在华期间系统学习了轨道工程、车辆系 统、信号与控制系统以及应急处置等专业内容。返岗后，他们将把所学成果运用到波哥大地铁一号线建 设和运营中，并带动本地团队能力提升。此前，首批10名工程师已于2023年完成相关培训并投入项目工 作。 ...

记者 孟雨涵 昨天，轨道交通13号线东延伸工程迎来两大关键进展：工程全线区间盾构隧道贯通、所有主体结构 封顶。13号线东延伸段新设高科中路站和丹桂路站，未来有望吸引更多高新技术企业汇聚于此间的上海 集成电路设计产业园。 ...

Core Points - The completion of the shield tunnel construction at Jiangbei Citizen Center Station marks a significant progress in the Nanjing Metro Line 4 Phase II project, specifically the cross-river shield project [1] - The shield receiving well has a wall thickness of 1.5 meters and an inner diameter of 12.1 meters, with a depth of 45.28 meters, facing high leakage risks due to the surrounding sandy and highly permeable soil [1] - The project team employed a layered demolition method to ensure efficiency while minimizing the impact on surrounding structures [1] Project Details - The Phase II of Line 4 starts from Longjiang Station, traverses through various areas including the Jiangxinzhou, and ends at Zhenzhuquan East Station, covering a total length of approximately 10 kilometers, all underground with 6 stations [1] - The cross-river tunnel, a critical segment, extends 3062.6 meters with the lowest point being 68.58 meters below the Yangtze River surface, setting a record for the deepest cross-river metro tunnel in the Yangtze River Delta [1] - Upon completion, the Phase II of Line 4 will enhance the urban cross-river metro network, alleviate traffic pressure, and provide more convenient public transportation services for citizens [1]

Core Viewpoint - The recent announcement from Ningbo's authorities regarding the need for re-approval of previously approved but unimplemented subway projects signals a significant shift in subway construction policies across various cities in China, indicating a tightening of regulations and a focus on quality and efficiency over mere expansion [2][4][12]. Summary by Sections Policy Changes - The National Development and Reform Commission has introduced new requirements for cities with previously approved subway projects that have not yet been implemented, necessitating re-approval for new planning submissions [2][4]. - The tightening of subway construction policies has been a gradual process, starting with the 2018 "Document No. 52," which raised the economic and fiscal thresholds for cities seeking to initiate subway projects [2][3]. Construction Criteria - New criteria for urban rail transit project submissions include a minimum public finance budget revenue of 30 billion yuan, a regional GDP of 300 billion yuan, and a resident population of at least 3 million [3]. - The focus has shifted from expanding the scale of subway construction to prioritizing quality and efficiency, with cities now required to demonstrate the ability to implement previously approved projects before applying for new ones [4][12]. Impact on Cities - Many cities are now under pressure to complete previously approved subway lines rather than pursuing new projects, as failure to meet construction standards could result in losing the right to build even approved lines [4][5]. - Cities like Chengdu are urged to accelerate the implementation of their approved subway lines, while others face challenges due to debt or insufficient passenger flow [5][6]. Investment Trends - The investment in urban rail transit construction peaked at 628.6 billion yuan in 2020 but has since declined, with 2023's investment at 521.4 billion yuan, a decrease of 17.05% from the peak [7]. - The new policies are expected to further limit the number of cities eligible for subway construction, as the thresholds for GDP and fiscal revenue are anticipated to increase significantly [11][12]. Urbanization and Future Directions - The ongoing tightening of subway construction policies reflects a broader transition in urbanization from rapid growth to stable development, emphasizing the need for cities to focus on optimizing existing infrastructure rather than expanding it [12][14]. - The future of urban competitiveness will rely more on enhancing existing services and infrastructure quality rather than merely increasing the quantity of subway lines [16][17].

Core Viewpoint - The successful completion of the TBM breakthrough for the Chongqing Rail Transit Line 7 Phase I project marks a significant milestone in the construction of a vital north-south transportation artery in western Chongqing, enhancing connectivity among various urban clusters [1][2]. Group 1: Project Overview - The Chongqing Rail Transit Line 7 Phase I project spans approximately 28 kilometers with 18 stations, connecting key areas such as Xiyong, Hangu, and Jinfeng [1]. - The recently completed section measures 2,340.669 meters, with the TBM segment accounting for 1,727.363 meters, navigating through complex geological conditions including high-strength sandstone and mudstone [1]. Group 2: Technical Innovations - The project team implemented innovative technologies to address the challenges of tunneling through long-distance, high-strength rock layers, utilizing a proprietary wear-resistant coating with a shear strength exceeding 350 MPa, significantly enhancing tool durability [2]. - The team achieved a remarkable feat of continuous tunneling through hard rock without the need for opening storage or changing tools, ensuring a smooth construction process [2]. Group 3: Safety Measures - To mitigate the risk of segment uplift in hard rock layers, the project team meticulously controlled tunneling parameters and optimized grouting processes, resulting in high-quality tunnel lining with no significant misalignment or damage [2]. - A specially developed track surface treatment device was created to enhance traction on steep gradients, effectively addressing safety concerns during transportation within the tunnel [2].

据市重大项目办相关负责人介绍，阜通站B2出入口的投用是北京市持续优化提升轨道交通服务水平、 促进区域协调发展的重要举措。该口的开通有效缩短了周边居民的进出站步行距离，提升了阜通站的客 流疏解能力和整体运行效率。同时，为师生通勤和市民购物提供了更便捷的出行条件，进一步优化区域 商业环境，促进城市功能融合。 据京投轨道公司相关负责人介绍，B2出入口的过街通道采用顶管法施工，下穿阜通西大街。工程面临 地质条件复杂、地下水位较高、施工场地受限等多重挑战。项目团队成功攻克富水粉细砂地层顶进、异 形基坑始发、大坡度精准控制、近距离穿越热力方沟及多条市政管线等技术难题，实现安全、高效施 工，展现了北京市在城市复杂环境下推进基础设施建设的先进技术和管理能力。 新京报讯(记者裴剑飞)记者从北京市重大项目办和京投轨道公司获悉，今天(11月29日)，北京地铁14号 线阜通站B2出入口及配套过街通道正式投入使用。 地铁14号线阜通站B2出入口位于广顺北大街与阜通西大街交叉口西北侧，地下建筑面积约1177平方 米，通道宽度达5.5米，设有上下行自动扶梯及人行步梯。该口毗邻里外里公寓、凯德MALL(望京店)、 首都师范大学附属实验学校( ...

Core Points - The completion of the last concrete pour for the Yujiaotou Station marks a significant milestone in the construction of Wuhan Metro Line 10 Phase I [1] - Yujiaotou Station is located at the intersection of Heping Avenue and Guosheng Road in Wuchang District, featuring a four-level underground structure with a maximum depth of 35.5 meters, equivalent to a 12-story building [1] - The station will have four entrances and will facilitate transfer to Line 5 upon completion [1] Construction Details - The construction team is adhering to a "zero leakage" standard, employing various techniques such as secondary roughening, custom cross-joint waterproof steel plates, and embedded grouting pipes to ensure structural integrity [1] - The entire Phase I project spans approximately 19 kilometers, connecting Hankou Railway Station to Beiyang Bridge and includes eight stations, all of which are currently under construction [1][2] Station Connectivity - The eight stations include Hankou Railway Station (interchange with Line 2), Tangjiadun Station (interchange with Line 6), Zhuye Mountain Station (interchange with Line 8), Erqi Xiaolu Station (interchange with Line 3), Erqi Road Station (interchange with Line 1), Yujiaotou Station (interchange with Line 5), Gangdu Huayuan Station (interchange with Line 12), and Gongye Road Station [2] - The Line 10 Phase I serves as a crucial link between the core areas of Hankou and Wuchang, connecting two major transportation hubs: Hankou Railway Station and Wuhan Railway Station [2]

Core Viewpoint - The Chengdu-Deyang Line of the suburban railway has commenced the prefabricated beam installation, marking a significant advancement in the construction of the elevated section of the line [1] Group 1: Project Overview - The Chengdu-Deyang Line is a key project in the "urban rail transit circle," utilizing a "factory prefabrication and on-site installation" method to enhance construction efficiency and reduce environmental impact compared to traditional methods [3] - The elevated section of the Chengdu-Deyang Line spans approximately 45.4 kilometers, accounting for 64% of the total line length, requiring the installation of 1,156 prefabricated beams produced at three manufacturing sites [3][4] Group 2: Construction Techniques and Innovations - The construction employs a composite foundation reinforcement technique to address the challenges of soft soil in the Sanxingdui area, ensuring the safe placement of heavy prefabricated beams [3] - A smart beam yard management platform has been established to create a "growth profile" for each prefabricated beam, enabling digital control of production parameters for quality assurance and traceability [4] Group 3: Project Progress and Impact - As of now, significant milestones have been achieved, including the completion of the main structure for nine underground stations and the ongoing installation of electromechanical systems and decorations in two stations [4] - The Chengdu-Deyang Line is expected to significantly reduce travel time between Chengdu and Deyang, facilitating regional industrial collaboration and efficient transportation for personnel [4]

Core Viewpoint - The Wuhan Metro Line 11 Phase IV project has made significant progress with the commencement of tunnel construction between Tangshan Station and the entry-exit line, utilizing advanced tunneling technology to address various engineering challenges [1][5]. Group 1: Project Overview - The total length of the Line 11 Phase IV project is 16.2 kilometers, featuring six stations: Tangshan Station, Sixin Avenue Station, Fangcao Road Station, Meilin Station, North National Expo Center Station, and Jiangguo Road Station [13]. - The construction of the right line tunnel spans 1,735 meters and faces three major technical challenges: shallow burial, steep slopes, and sharp bends [5]. Group 2: Engineering Challenges and Solutions - The minimum burial depth of the tunnel is only 4.4 meters, significantly less than the diameter of the tunneling machine, necessitating multiple protective measures, including a 0.7-meter thick anti-floating reinforced concrete slab on the surface and 40 anti-pull piles on both sides of the tunnel [5]. - The maximum slope of the section reaches 32‰, and the minimum turning radius is 300 meters, which poses high operational demands on the tunneling machine [5]. Group 3: Construction Progress - Another tunneling machine from Tangshan Station has safely advanced 400 meters towards Sixin Avenue Station, navigating through 12 different geological layers, which complicates tunnel axis control [7]. - The left line tunneling machine is expected to complete assembly next week, allowing for simultaneous tunneling of both left and right lines [5][13]. Group 4: Workforce and Expertise - A total of three tunneling machines will be deployed from Tangshan Station, supported by a team of 120 personnel with an average experience of five years, including a core group of "post-80s" assembly workers and "post-90s" operators [9].