据广东省应急管理厅消息，近日，广东省政府批复同意了深江铁路"12·4"重大坍塌事故调查 报告。经广东省政府事故调查组认定，深江铁路"12·4"重大坍塌事故是一起参建单位违规施 工掘进引发掌子面上方局部塌方，异常工况处置时未能采取有效的工程处理措施导致地面塌 陷，造成地面人员随地面塌陷坠亡的生产安全责任事故。 定将事故调查过程中发现的有关企业、单位及公职人员涉嫌失职失责问题线索及相关材料， 移交纪检监察机关。对上述涉事企业、单位及公职人员，按照党组织隶属关系和干部管理权 限由有关单位按规定处理。 针对事故中暴露的问题，事故调查组总结了六个方面的主要教训：风险防范失守，监测预警 失灵；长期"先施工后变更设计"，冒险掘进酿成恶果；制度机制流于形式，现场管理形同虚 设；应急救援体系先天不足，异常工况处置混乱无序；简单套用山岭隧道建设标准，进入城 市地下空间频频出事；同类事故反复发生，背后是对安全的漠视。同时，提出六项整改和防 范措施建议：统筹发展和安全，源头防控重大安全风险；把握铁路隧道施工特点，有效防范 化解城市地下空间施工风险；提高本质安全水平，针对性加强施工安全措施；加强事前预 防，落实参建各方安全生产主体责任 ...

Core Points - The successful rotation of the T-shaped structure of the Guangzhongjiang Bridge marks the completion of the first rotating bridge construction for the Shenzhen-Jiangmen Railway [1][3] - The Shenzhen-Jiangmen Railway, approximately 116 kilometers long, connects Shenzhen and Jiangmen, with design speeds of 200 km/h and 250 km/h for different segments [3][6] - The construction of the bridge involved significant engineering challenges, including the need to rotate a 11,216-ton structure over an existing freight railway [3][4] Construction Details - The Guangzhongjiang Bridge spans 13.41 kilometers and features a T-shaped structure that was rotated 30.2 degrees to align with the existing railway [3][4] - The project utilized advanced technology, including 5G and a dynamic intelligent monitoring platform based on BIM and digital twin technology, to ensure precision during the rotation process [4] - The rotation process was conducted under challenging conditions, with the main support structure only 9.78 meters from the center of the freight line, which carries an average of 30 freight trains and 51,000 tons of cargo daily [3][4] Strategic Importance - The Shenzhen-Jiangmen Railway is a crucial part of the Guangdong-Hong Kong-Macao Greater Bay Area's rail network, enhancing connectivity between key economic zones [6] - Once completed, the railway will facilitate high-speed connections between major trade areas, contributing to regional economic development and integration [6]

Core Viewpoint - The construction of the Shenjiang Railway, a key project in the Guangdong-Hong Kong-Macao Greater Bay Area, aims to enhance connectivity between major economic zones, facilitating a half-hour high-speed rail link between Shenzhen and Guangzhou [2] Group 1: Project Overview - The Shenjiang Railway spans approximately 116 kilometers, with a design speed of 200 km/h from Shenzhen Xili to Guangzhou Nansha and 250 km/h from Guangzhou Nansha to Jiangmen [2] - A significant construction feature is the Guangzhongjiang Grand Bridge, which is 13.41 kilometers long and includes a T-shaped rotating bridge weighing 11,216 tons with a span of 160 meters [2] Group 2: Construction Methodology - The project employs a rotation construction method, where the beam body is first cast parallel to the existing railway and then rotated 30.2 degrees clockwise to achieve the connection [2] Group 3: Economic Impact - Upon completion, the Shenjiang Railway will connect the Qianhai Free Trade Zone in Shenzhen with the Nansha Free Trade Zone in Guangzhou, serving as a "golden channel" for economic and social development in the western Pearl River Delta region [2] - The railway will also interconnect with other major lines such as the Guangzhou-Shenzhen-Hong Kong High-Speed Railway and the Shenmou Railway, further enhancing regional connectivity [2]

Group 1 - The integration of the Shenzhen metropolitan area is rapidly advancing, with significant progress in multiple rail transit lines connecting Shenzhen, Dongguan, and Huizhou, forming a "one-hour traffic circle" [1] - The successful completion of the shield tunnel for the Shenzhen-Huizhou intercity line marks a completion rate of over 85%, laying a solid foundation for future connectivity [1] - Shenzhen is promoting three cross-city metro projects that will enhance rail connectivity between Shenzhen and Dongguan, facilitating access to key areas [1] Group 2 - The "Shenzhen-adjacent areas" in Dongguan and Huizhou have become focal points for Shenzhen investors, with improved transportation options enhancing the convenience of living in dual-city environments [2] - The rapid development of rail transit infrastructure is expected to expand the influence of major cities like Guangzhou and Shenzhen, extending public services and economic activities to surrounding areas [2] - The extension of rail lines is anticipated to reshape industrial layouts, with a focus on transportation hubs, creating a "Shenzhen R&D + Dongguan trial production" closed loop [2]

Group 1 - The "Two Major" projects are driving the acceleration of significant engineering projects across multiple regions, supported by macro policies aimed at expanding effective investment [2][3] - The Beijing Urban Sub-center Station, part of the "Two Major" projects, is progressing to the decoration phase and is expected to be completed by the end of 2025, enhancing connectivity to major airports and regions [2] - As of early April, the "Two Major" projects supported by ultra-long-term special bonds have attracted approximately 2.1 trillion yuan in social capital investment [3] Group 2 - In the first quarter, national investment exceeded expectations, with a strong growth momentum expected to continue in the first four months of the year [4] - The State Council approved new nuclear power projects, involving significant participation from private enterprises, with ownership stakes exceeding 10% [4]

Core Points - The main tower of the key project, the Shenchang Railway's main bridge across the Modao River, has been capped on May 11 [2][3][5] - The bridge is a 140-meter high cable-stayed bridge that spans the Modao River, located at the boundary between Zhongshan and Jiangmen cities [3][5][10] - The Shenchang Railway is an important part of China's "Eight Vertical and Eight Horizontal" high-speed rail network along the coastal corridor, with a total length of 116 kilometers starting from the Shenzhen Xili Station [3][10][12] - Upon completion, the railway will enable a one-hour travel time between Shenzhen and Jiangmen, connecting five cities: Shenzhen, Dongguan, Guangzhou, Zhongshan, and Jiangmen [5][10][12]

Core Points - The main tower of the Shencheng Railway's bridge over the Modao River has been capped, with the second tower expected to be capped by the end of June 2023, laying the groundwork for the line's completion by 2028 [1][4] - The Shencheng Railway spans 116 kilometers, connecting five cities in the Guangdong-Hong Kong-Macao Greater Bay Area, serving as a major intercity corridor in the Pearl River Delta [1][6] Project Details - The project, undertaken by China Railway Construction Bridge Bureau, has a total length of 23.72 kilometers, with the bridge comprising 100% of the project [2] - The main bridge measures 689.8 meters in length, with a main span of 320 meters, and is designed to cross a Class I navigation channel at a height of 140 meters [2] Construction Challenges - The construction of the main tower faced significant challenges, including high navigation standards, fast water flow, and limited working space, with a focus on high-altitude work risk management and temperature control for large concrete volumes [4][6] - The project implemented a "three-dimensional safety protection network" and utilized a fully enclosed intelligent tower construction system to enhance precision and stability, reducing high-altitude work risks by 50% [4][6] Technological Innovations - The project employed digital twin technology to simulate construction processes, optimizing construction plans and using intelligent monitoring systems to track stress, deformation, environmental parameters, and equipment status in real-time [4] - The maximum single concrete pouring volume reached 518 cubic meters, with temperature sensors installed to monitor temperature changes during the pouring process, effectively preventing cracks due to temperature stress [6] Economic Impact - The Shencheng Railway is a key project in the Greater Bay Area's "half-hour economic circle," enabling travel from Jiangmen to Shenzhen in under one hour and connecting with the Guangzhou-Shenzhen-Hong Kong Express Rail Link, which is crucial for developing a "railway-based Greater Bay Area" [6]

Group 1 - The Guangzhan High-Speed Railway is set to open within the year, reducing travel time from Guangzhou to Zhanjiang to 1.5 hours, enhancing connectivity in the Guangdong-Hong Kong-Macao Greater Bay Area [1][2] - The Guangzhan High-Speed Railway spans approximately 400 kilometers and will facilitate a direct link between major cities, promoting integrated development in the region [2] - The construction of the main station building at Foshan Station has been completed, laying a solid foundation for the railway's operational requirements [2] Group 2 - The Shenjiang Railway, a key intercity corridor in the Pearl River Delta, has completed the pile foundation construction for the first station, Henglan Station, marking significant progress in the project [3] - The Shenjiang Railway will connect Shenzhen to Jiangmen, covering a total length of 116.12 kilometers and featuring seven stations, significantly improving travel times within the region [3] - Upon completion, the Shenjiang Railway will enhance coastal connectivity and integrate with the Guangzhou-Shenzhen-Hong Kong High-Speed Railway, further promoting the Greater Bay Area's development [3] Group 3 - The construction of the Deep-Shan Station, a major railway hub connecting the Greater Bay Area to the eastern Guangdong region, has entered the above-ground structural phase [4][5] - Deep-Shan Station will serve as a strategic node for the Greater Bay Area, facilitating a "Shenzhen half-hour" and "Guangzhou 40 minutes" travel circle [5] - The station's construction is crucial for improving transportation capacity in the Deep-Shan Special Cooperation Zone and enhancing communication between the Greater Bay Area and eastern Guangdong [5]