Economic efficiency of innovative subgrade reinforcement technologies for railway trackbed

Abstract

This article presents a systematic analysis of the effectiveness of standard design solutions for railway subgrade reinforcement under the specific conditions of Uzbekistan, based on long-term monitoring data. In the context of high-speed train operations (160–200 km/h), the stability, deformation resistance, and operational reliability of the subgrade are considered key factors for ensuring safety. Observations conducted on experimental sections confirm the positive outcomes of using geosynthetic materials (geotextiles and planar geogrids), including reduced settlement, decreased ballast contamination by soil particles, extended service life, and lower routine maintenance costs. The study develops structural and technological recommendations adapted to the complex climatic and geological conditions of Uzbekistan. Based on monitoring results, the economic efficiency of subgrade reinforcement technologies is evaluated. The advantages of an integrated engineering approach are substantiated, including uniform load distribution, improved drainage conditions, and extended intervals between repairs. A comparative analysis with international experience is also provided.