Urban transportation systems' construction level is constantly improving. When constructing light rail projects, original construction techniques are also required to meet higher requirements. Due to the relatively high difficulty of light rail construction, construction enterprises must strictly follow project characteristics and thoroughly analyze and control key aspects of each construction link to significantly improve project construction quality. When supervising and managing the assembly of light rail segments, construction enterprises must have a comprehensive understanding of the technology application and implement targeted quality control measures to improve the project construction quality and efficiency. This article conducts relevant analysis and discussion on the construction technology of light rail segmental beam assembly.

I. Light Rail Segmental Beam Assembly Construction Technology Application Measures

(I) Lifting Construction Technology Application Measures

When lifting segmental beams, the segmental beams should first be transported to the construction site and the beam segments should be effectively lifted using a bridge erection machine. After the first beam segment is lifted in place, subsequent operations are required, and a space of about 20 centimeters should be reserved to support the gluing and splicing operation. When handling beam segment lifting, positioning treatment is necessary, and the construction parameters must be thoroughly measured. Construction workers should carry out measurement work in a timely manner after completing each link. Once construction errors are identified, targeted repair measures must be implemented to prevent adverse effects on the lifting operation's progress. After the lifting operation is complete, construction workers need to disassemble the bridge erection machine, thoroughly clean the site impurities, and conduct quality inspection work.

(II) Gluing and Splicing Construction Technology Application Measures

When gluing and splicing beam segments, it 's important to ensure that the lifting device's height and the longitudinal and transverse slopes are in a stable state. Specialized technicians are required to apply epoxy adhesive to the surface of the beam segments when translating them. Construction workers must accurately join the beam segments with the reference beam strictly according to the design requirements and also carry out prestressing tensioning treatment. When hanging the beam segments, they need to be hung on the main girder of the bridge erection machine. During construction, repeated operations are required until the entire beam segment is spliced into a complete structure. After the splicing is completed, construction workers need to effectively handle the wet joints on both sides and conduct strength tests to ensure that the beam segments can meet the construction requirements during application.

(III) Wet Joint Construction Technology Application Measures

When dealing with wet joints, first lift the outer formwork system of the wet joint in the flange plate area and select an appropriate position to install the prestressed corrugated pipe in accordance with the design requirements. After the pipeline installation is completed, all parameters must be thoroughly inspected and if there are any cracks or other issues in the pipeline, it should be effectively detected. After ensuring the pipeline operation complies with construction requirements, waterproof tape must be selected to tightly wrap it to enhance sealing performance. After the installation of the inner formwork system is complete, construction workers must fix the inner and outer formworks , as well as the box girders at both ends. After fixation, the concrete material needs to be prepared. Construction workers must thoroughly assess the quality of raw materials and construct the concrete structure to meet the construction requirements, then use it in the wet joint pouring operation. Construction workers must properly vibrate the concrete to improve its compactness of the concrete structure. After determining the concrete structure's application strength, if the measured value meets the design requirements, prestressing tensioning treatment can be carried out. When removing the formwork, construction workers need to take safety precautions to avoid any damage caused by direct contact between the formwork and the concrete structure. When dealing with inner formwork, manual demolition can be adopted. When transferring the removed formwork, it needs to be transported to the designated location.

(IV) Application Measures of Other Construction Technologies

When managing the prestressing tensioning and pipeline grouting links, the appropriate equipment should be selected to handle the pipeline according to the design requirements of the tensioning force. Construction workers need to close the airtight valve on the component connected to the vacuum pump. After starting the vacuum pump, all the air in the holes should be removed. Construction workers must check the consistency of the slurry output by the grout pump as soon as possible. After meeting the design requirements, it should be effectively connected to the outlet pipe. During the grouting process, a negative pressure environment needs to form inside the duct and the slurry should be transported to a specific location, and the outlet valve should be closed in time. If the grouting pump still needs to operate normally after the valve is closed, the slurry holding time should be about 3 minutes. Construction workers can adjust the slurry holding time to match the actual construction situation. After the grouting operation is completed, the anchor head needs to be sealed, and the crossing ability of the bridge erection machine should be improved. After the permanent prestressing tensioning operation is completed, construction workers need to properly adjust the bridge erection machine to ensure smooth crossing and effective support for the subsequent box girder assembly operation. When supervising the crossing process of the bridge erection machine, it 's crucial to have a comprehensive understanding of the actual situation and select the correct crossing form on this basis.

In conclusion, when managing the assembly of light rail segmental beams, construction enterprises need to actively accumulate experience, improve the comprehensive control level, and formulate a targeted technical management system. By comprehensively preventing and controlling construction risks, the smooth completion of the project can be promoted. In fact, the assembly construction of segmental beams has relatively strong process characteristics. Construction enterprises can appropriately adjust the application form of the existing construction technology according to the characteristics of the project construction to ensure the smooth implementation of construction technology. Construction enterprises also need to select the optimal assembly operation method, extend the application time of the project, and promote the healthy development of the project to create more comprehensive benefits.