This study investigated and analyzed the assembly attitude of prefabricated partition walls on the Shanghai Airport Link Line to ensure high assembly quality within largediameter shield tunnels. Initially, the coordinate system of the partition walls was established. Subsequently, the study examined the assembly attitude under initial assembly errors and errorfree scenarios. It focused on obtaining precise attitude information and the analytical expression of the partition wall's bottom plane equation for each operational condition. The analytical results reveal the following: 1) In scenarios where there are no initial assembly errors or where errors are limited to translation or rotation, the selection of control points and jacking sequences within the regulating system does not affect the assembly quality of the partition walls. The assembly attitude can be effectively managed using the derived expression for the wall's attitude. 2) When initial assembly errors extend beyond simple translation or rotation, precise control of the partition wall's attitude becomes crucial. This involves adjusting the jacking sequences within the regulating system accordingly. Utilizing the obtained expression allows for improved assembly accuracy of the partition walls. 3) The study successfully applied an analytical formula to constructing partition walls, demonstrating favorable engineering outcomes in practical applications.

Urban rail transit dispatching and command work involve complex system engineering, and the emergency dispatching and command system, as the top priority of urban rail transit dispatching and command work, directly affects the level of enterprise operation services and train operation safety. The emergency dispatch and command system is a paramount component within this framework. Using the Tianjin Metro emergency dispatch as a case study, this research first outlines the foundational modes of emergency dispatch and command used in domestic urban rail transit. It also integrates current trends in information integration and intelligent operations within urban rail transit. The study then delineates the objectives and functional requirements specific to the Tianjin Metro emergency dispatch and command platform. It proposes an architecture comprising several key layers: infrastructure, data resources, application support, application software, information display, regulatory standards, and security systems. This structured approach ensures comprehensive coverage of operational needs and regulatory compliance. Furthermore, leveraging technologies such as cloud computing and big data, we explored the technical scheme and implementation plan of the Tianjin Metro emergency dispatch command platform for the integration demand and intelligent trend. The research results can provide decision support for the safe and orderly operation and dispatch of subways under networked conditions.

In order to enhance the excavation efficiency of an EPB/TBM dualmode shield machine and minimize disc cutter wear, the study was conducted on the performance of disc cutters along the Intercity Railway from Airport East Station to Huangmabu Station, Shenzhen. The research focused on the fullsection hard rock strata from ZDK8+583.0 to ZDK8+359.8 on the left side of the tunnel. Initially, the study analyzed cutter replacement conditions and wear patterns based on different functions and types of disc cutters to determine optimal performance criteria. Subsequently, the service life of the disc cutters under optimal conditions was evaluated to guide replacement scheduling. Finally, a tool information management system tailored to the project's requirements was established. The findings highlight that China Railway's wideblade disc cutter is wellsuited for excavating this specific formation. The implemented tool management system effectively manages comprehensive information about the tools, which helps ensure costeffective and efficient onsite operations. This research serves as a practical guide for choosing disc cutters for shield tunneling machines. It promotes better information management practices for disc cutters, leading to safer and more efficient operations.

To address the urgent need for vibration and noise reduction in the development of upper covers, this paper summarizes existing control measures for tracking vibration and noise in depots, emphasizing the necessity of implementing seamless rails in depot lines. We also examine the requirements for sleepers. Our calculations indicate that depots can meet the strength and stability requirements for seamless lines by using arm span resistance pillows in conjunction with other strengthening measures. Additionally, this paper introduces a seamless turnout technology for No.7 movable turnouts and verifies their seamless integration based on actual usage conditions in Beijing. The findings suggest that both the turnouts and the turnout groups are suitable for seamless application. A comparative test conducted at a speed of 15 km/h reveals that the movable turnout reduces vibration and noise by 35 dB compared to fixed turnouts.

To address these challenges, a pragmatic design approach for the subway track panel and the substantial opening in the panel significantly reduces plate stiffness. Under construction conditions, traditional twodimensional frame section calculations fail to meet design requirements and realworld conditions. Drawing from a specific case involving the design of a stacked subway track panel in the highwaterpressure fine particle strata east of Beijing, this paper introduces the project's envelope and main structural design concepts. It examines critical structural calculation issues, consolidates design insights, and outlines operational conditions. The study yields a practical design scheme, offering valuable insights for future subway track panel designs during construction processes.

Intercity railways in the GuangdongHong KongMacao Greater Bay Area (GBA) face operational challenges when used for public transit. These challenges include unclear functional specialization, misalignment with urban development plans, and insufficient network operation, leading to low service efficiency. This study proposes a reorganization strategy informed by successful regional rail transit practices globally. The strategy focuses on three key areas: (1) Reorganizing intercity railways, urban express lines, and other rail lines based on distinct functional levels for optimized service allocation. (2) Optimizing the network layout based on urban travel demand characteristics. This includes optimizing external corridors, strengthening fast and direct connections within the core area, and further strengthening urban rail interconnection through station wiring and connecting lines. (3) Optimizing intercity station and transfer services to improve passenger experience. Implementing these strategies is expected to provide valuable insights for improving operational service levels and promoting the sustainable development of intercity railways in the GBA.

To identify key stations in urban rail transit networks and study their evolution over multiple years, we developed a key station recognition method based on truncated singular value decomposition (TSVD). We selected origindestination (OD) data from the morning peak hours between 2011 and 2019 in Beijing as the dataset. The analysis involved evaluating the evolution of network passenger flow and identifying key stations in subway networks using key eigenvectors. These results were then compared with those obtained from complex network methods. The analysis demonstrates that TSVD can effectively identify key network stations by considering the OD distribution. The outcomes from TSVD better represent the spatial distribution of network passenger flow than traditional methods. The results revealed that the spatial layout of key stations in Beijing's urban rail transit has evolved towards multiple centers, such as Northwest Xi’erqi and Southwest Fengtai Science Park. These stations are gradually forming network passenger flow centers and establishing connections. Additionally, stations like Southeast Tu Qiao and Northeast Fengbo are showing preliminary trends toward becoming network passenger flow centers.

To address the challenge of effectively managing APT in urban rail transit scenarios, this paper proposes a method that combines attack source graphs with deep traffic learning. This integrated approach merges attack reconstruction with traffic monitoring to facilitate identifying and detecting APT attacks. Experimental results demonstrate that this model can effectively trace the sources of APT attacks. Compared to traditional APT attack detection models based on sandboxes or abnormal characteristics, this combined model significantly improves detection accuracy, precision, recall rate, and other performance indicators.

The optimization of slow traffic systems in urban rail transit stations improves the operational efficiency of rail transit, upgrades the spatial quality of stations, and promotes the integration of stations and cities. To provide a reference for planning theories and practical research in this field in China, based on the literature related to slow traffic systems in urban rail transit station areas in WoS and CNKI core databases, and with the aid of CiteSpace, a literature analysis tool, this paper outlines the temporal, national, disciplinary, and journal distributions, analyzes the historical development of research and identifies recent hotspots: synergy research of stations and cities, shared bicycle transfer research, and accessibility research. In addition, the current progress in four key research directions is reviewed: slow traffic accessibility, slow traffic environment, slow traffic transfer, and slow traffic facility planning. Moreover, this paper proposes future research directions that can be expanded in terms of research object, method, and scope.

The construction of dual prevention mechanisms is an important task in the safety management of urban rail transit projects. Currently, guidance in the construction of dual prevention mechanisms is deficient owing to the lack of laws and regulations, differences in the understanding and implementation of dual prevention mechanisms in various cities, and various problems in the execution process. An investigation of the current scenario of the construction of the dual prevention mechanisms revealed that the problems are primarily manifested in the mixing of phrases and terminologies, lack of safety risk management assessments, incomplete investigation and rectification of hidden dangers, inconsistent grading standards of hidden dangers, and insufficient combinations of risk and hidden danger controls. Relevant research can provide a reference for the standardization and improvement of dual prevention and control in the field of urban rail transit engineering.