محمدابراهيم حسين زاده

This thesis focuses on the eva‎luation and analysis of geometric quality indices for railway tracks in Iran’s national railway network. Systematic and effective maintenance of railway tracks is crucial for ensuring the safety and efficiency of the railway system. Geometric quality indices serve as key tools for assessing the condition and performance of the tracks, enabling the identification of defects and failures. Initially, the importance of the railway network and the impact of maintenance and preventive repairs on overall network performance are discussed. Additionally, relevant standards and concepts related to geometric quality indices, such as vertical and horizontal deviations, twists, cross-level deviations, and superelevation, are examined in detail, based on the EN 13848 standard. This study collected and analyzed data obtained from advanced measuring devices like the EM120, and compared the most commonly used indices in various countries for eva‎luating track geometry quality. To improve the maintenance processes, this research thoroughly reviewed the quality indices and proposed combined criteria for more accurate assessment of the condition of Iran’s railway tracks. The collected data from the Iranian railway network were processed and analyzed using MATLAB. One of the key achievements of this research was identifying the convergence and divergence between different indices and assessing their compliance with international standards. The results helped to pinpoint the strengths and weaknesses of the Iranian railway network and provided practical solutions for enhancing track quality and performance. Finally, based on the findings of this research, several recommendations were proposed for improving track maintenance systems. These include optimizing preventive maintenance processes, utilizing advanced technologies for monitoring and eva‎luating track conditions, and upgrading the current standards, which can significantly enhance safety and efficiency in Iran’s railway network.

.نگهداري و تعمير , .شاخص‌هاي كيفي , .شاخص كيفيت خط , .خطوط راه‌آهن , .همگرايي شاخص

.Maintenance and Repair , .Quality Indicators , .Line Quality Index , .Railway Lines , .Convergence Index

Mohammad Ebrahim Hosein zadeh

Saeed Mohammad zadeh