To provide a theoretical basis and reference for crack control during construction, this study first monitored the construction of side walls by embedding temperature and stress sensors. The measured data were then compared with the Midas civil finite element model, the law for a temperature field, and the stress field during the construction of the side walls. The field monitoring and numerical analysis showed that the hydration heat reaction of the concrete in the early stage was relatively fast, reaching its maximum value only 20 h after pouring. The temperature was high in summer, and the cooling rate was relatively slow at approximately 0.40 °C/h. However, the cooling rate of the middle layer was relatively fast. The time at which the compressive stress reached its maximum value was close to that at which the temperature reached its maximum value. Subsequently, it entered the shrinkage deformation stage. After the critical condition of zero stress occurred, the tensile stress gradually increased with a continuous decrease in temperature, and the tensile stress at each measuring point tended to be stable 50 h after pouring. The finite element model results were close to the field monitoring data. Thus, it could play a role in the prediction of and theoretical basis for fractures. It could also be used as a reference for actual fracture control in engineering.

The government of Macau is actively promoting rail transportation planning and construction to enhance the capacity of urban transportation systems, promote sustainable transportation development, achieve green development goals, and provide reliable travel options for both Macau residents and tourists. This study analyzes the current state of rail construction development in Macau and summarizes key experiences in rail transport planning. These include supporting the urban pattern, enhancing traffic capacity, optimizing traffic structure, and aligning with public preferences. Additionally, the study outlines technical strategies for deployment, such as serving main corridors, connecting key hubs, integrating multiple modes, and coordinating spatial relationships, thus providing a reference for other cities in rail transport development.

This study aims to enhance the safety management capabilities of urban rail transit operators by designing and implementing an intelligent safety management platform, which has been validated in practice on Urumqi Metro Line 1. Centered around a dual prevention mechanism, the platform integrates 10 functional modules to achieve risk prediction and early warning, comprehensive safety assessment, safety supervision and inspection, as well as emergency decisionmaking support and resource sharing. The analysis results are presented on the platform interface in a visually graphic format, thereby increasing the efficiency of safety production management. The findings of this research can serve as a reference for the digital transformation of safety management in other urban rail transit enterprises.

To address the problems of dynamic failure and different services in the reliability analysis of an LTEM (Long Term Evolution for Machines) trainground radio communication system, this study evaluated the reliability of an LTEM trainground radio communication system based on a dynamic Bayesian network (DBN). First, the reliability block diagram, which was constructed by analyzing the LTEM system structure and function, was transformed into a DBN, and the DBN structure and parameter modeling were conducted. Subsequently, the reliability of the LTEM system was obtained and compared based on the forward inference of the DBN. Finally, based on the backward inference of the DBN, the weaknesses of the LTEM system were recognized as a reference for operation and maintenance. The results indicate that while the LTEM system is highly reliable, the building baseband unit and train access unit are vulnerabilities that require attention.

Airport rail transit lines serve large airports and differ from ordinary urban rail transit lines in terms of functional role, passenger service, passenger flow characteristics, and service standards. Transport service standards for this type of particular transit line need to be improved. To meet the rapid distribution needs of airport passenger flow and enhance the quality of airport passenger services, designing specific service standards is essential. First, the particularity of the special line is analyzed from the perspectives of service passengers, technical conditions, passengers' travel needs, etc. Second, the existing service standards for rail transit are examined, and the necessity of establishing transport service standards for these special lines is elaborated. Finally, suggestions for designing service standards from the aspects of design principles, standard framework, and key contents of services are provided. This study aims to provide a reference for formulating service standards for special rail transit airport lines.

To enhance the emergency response capability of subway waterlogging, this study investigated waterbarrier technologies and devices for subways, both domestically and internationally. A systematic review of conventional and innovative subway waterbarrier technologies and devices was conducted, focusing on subway waterlogging risk points such as station entrances/exits, vent shafts, main tracks, and vehicle depots. The advantages and disadvantages of various subway water barrier technologies and devices were analyzed. This study discusses the challenges faced by subway water barrier technologies and devices in terms of cost economy, intelligence, automation, and sustainability. Recommendations are provided for structural optimization, material improvement, multifunctional water barrier devices, intelligent and automated control, green technology, and sustainable development. The results indicate that different waterbarrier devices are suited to various application scenarios. Water barrier devices should be selected based on risk points and flood characteristics. Conventional subway water barrier devices are widely used and are technologically mature. Compared with these technologies, new technologies have advantages in terms of automation, resourcesaving, and improved emergency reliability. This study aims to serve as a reference for the design, installation, and application of subway waterbarrier devices, providing technical support for ensuring the safe operation of subway systems and essentially responding to subway waterlogging.

When a traffic system is abnormal, passengers are prone to blindness, panic, conformity, and other psychological problems. They may thus make incomplete rational decisions. The Multinominal Logit (MNL) model is based on the assumptions of complete information and rationality. It has poor adaptability when used for abnormal situations. Therefore, the incomplete rationality of passengers under abnormal conditions was described using the cumulative prospect theory, and individual differences among passengers were considered to resolve this inability of the classical MNL model. First, the four factors of time, cost, comfort, and convenience were comprehensively considered, and a model was constructed of rail transit nonnormal passenger travel mode selection based on the cumulative prospect theory. It was used to characterize the incomplete rationality of passengers. Afterward, a questionnaire survey was conducted to calibrate the model parameters. Based on the survey results, a differentiated reference point following a Poisson distribution was obtained to describe the reference point dependency phenomenon of the model. The results of a case study indicated that the Poisson distribution test values with the introduction of differentiated reference points met the test criterion of a value that was greater than or equal to 0.05. It explained the essence of passengers' different decisionmaking results and presented a trend of comprehensive prospects fluctuating with the reference points. Finally, this model was compared with the MNL model to verify the rationality of the model. The research results indicated that the model focused on abnormal situations and reflected the incomplete rationality and individual differences of passengers. The overall accuracy was higher than that of the MNL model, and the average absolute error was reduced by 4.9%. The accuracy of the microscopic calculation results was 25.4% better than that of the MNL model. This could provide theoretical support for traffic demand prediction under abnormal rail transit conditions.

This study focuses on a rectangular prefabricated station structure scheme developed and applied for the first time to the Shenzhen Phase V Project. Combined with the evolution process of the prefabricated structure scheme with dry connections, this paper introduces in detail the section design scheme of the rectangular structure scheme, structural partitioning and joint, bracing system of the beamcolumn, and static and dynamic performances. The rectangular prefabricated station structure scheme can be applied to different station width requirements, and an adjustable template is used to effectively improve the universality of the rectangularstructure components. Simultaneously, the rectangular structure can be expanded to accommodate different types of stations, such as threelayer twospan or twolayer threespan. Additionally, the bending bearing capacity of a rectangular assembled station joint was verified by a fullscale joint test, and the adaptability of the theoretical calculation method of the existing joint research to structural size changes was verified. The results of this study are intended to provide a reference and experience for subsequent prefabricated structure designs and engineering applications.

The mechanism of the geological deformation caused by shield tunneling construction was combined with a threedimensional numerical simulation method to simulate the displacement of bridge piles during the smallangle side crossing of highspeed railway bridge group piles in subway shield tunnels constructed in sandy areas. Analyses were conducted on the mechanism of the impact of metro shield tunnels on highspeed railway bridges when the shield reaches the front of the piles, reaches the piles, and moves past the piles, as well as when the shield tail is detached and after the shield passes the piles. Three protection plans were then proposed for highspeed railway bridges, which included isolation pile measures, geological reinforcement measures, and isolation piles + geological reinforcement. Threedimensional numerical simulations were used to analyze the entire process of shield tunnel boring through the pile groups of highspeed railway bridges under the conditions of no protection scheme and when adopting the above three protection schemes. The findings revealed that without protective measures or with the sole use of ground reinforcement or isolation piles, the deformation of a highspeed railway bridge exceeds the allowable standards during the lateral passage of a shield tunnel. However, with the implementation of both isolation piles and ground reinforcement, the deformation remains within the prescribed limits. After the scheme comparison, the design scheme of isolation piles and ground reinforcement were ultimately adopted for implementation. During the onsite implementation, the entire process was monitored, and the monitoring results were consistent with the numerical calculations, verifying the rationality of the highspeed railway bridge protection plan.

Concerning the noise pollution caused by the operation of the ground line of urban rail transit, the access line of the Zhongzhou Avenue depot in Zhengzhou Metro Line 5 is taken as an engineering example. The noise is tested in situ before and after the installation of sound barriers, and the noise reduction process is simulated with Virtual Lab software. The simulation results are in good agreement with the tested sound pressure level changing with the sound source frequency, and the accuracy of the acoustic simulation model and calculation method is verified. The insertion loss of sound pressure level is adopted to characterize the noise reduction effectiveness of the sound barrier, and further research are conducted on the noise reduction effectiveness of triangular wedge, QRD (Quadratic Residue Diffuser) sequence, PRD (Prime Root Diffuser) sequence and micro perforated panel PRD I composite sound barrier, and the results reveal that the wedge angle significantly impacts the noise reduction effectiveness of the triangular wedge sound barrier; greater irregularity enhances the diffusion effect for diffracted sound in PRD sound barriers, and PRD sound barriers exhibit better noise reduction effectiveness than QRD sound barriers; the overall noise reduction effectiveness of PRD type I sound barrier is slightly higher than that of PRD type II sound barrier, to reduce appropriately the design frequency of the diffusion body, increase the order, and expand the slot width can advance the noise reduction performance of the PRD type I sound barrier; to add micro perforated plate resonance sound absorption structure in the diffuser end groove of micro perforated panel PRD I composite can further improve the noise reduction of the end structure of diffuser, which would have an ideal application prospect for improving the noise environment of metro access lines.