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SPEPC TECHNOLOGY
Solution
Visual Monitoring Project for Subgrade Settlement on the Pengze Section of the Tongjiu Railway, Nanchang Railway Bureau
Project Background
Subgrade settlement in railways is a critical hidden hazard that affects track smoothness and operational safety. Traditional monitoring methods rely primarily on manual measurements using total stations or static leveling instruments, which suffer from drawbacks such as the need for manual station setup and point-by-point aiming, low efficiency, data lag, and complex deployment. As an important conventional‑speed trunk line connecting Anhui and Jiangxi provinces, the Tongjiu Railway has been in service for many years, with some sections facing the risk of slow subgrade settlement. The Track Maintenance Department of the Nanchang Railway Bureau urgently needs to adopt next‑generation automated, non‑contact, high‑precision monitoring technologies to enable continuous tracking of settlement and horizontal displacement in key subgrade segments. In 2025, the Nanchang Railway Bureau took the lead in deploying visual‑intelligence deformation monitoring technology for subgrade settlement monitoring along the Pengze section, replacing traditional manual measurement approaches and enhancing both monitoring efficiency and early‑warning response capabilities.
Monitoring Equipment and Solutions
In the Pengze section, SPEPC visual intelligent deformation monitoring instruments have been deployed at key cross-sections of the roadbed. The equipment leverages non-contact sub-pixel vision technology, employing high-resolution sensors and advanced algorithms to achieve sub-millimeter displacement sensing, enabling precise detection of early-stage roadbed settlement and slippage. The system supports simultaneous tracking of multiple targets, providing continuous, full‑area monitoring of roadbed cross‑sections. Powered by solar energy and transmitting data wirelessly via 4G, it is well suited for remote, off-grid environments. Equipped with a built-in ±0.2℃ temperature‑controlled system, the device effectively mitigates measurement drift caused by ambient temperature variations, ensuring long-term, stable measurement accuracy. Monitoring data is uploaded to a cloud‑based early warning platform, enabling automated analysis and multi‑level alerting.
Implementation Effectiveness
Compared with traditional total stations—characterized by long monitoring cycles, the need for manual station setup and point-by-point targeting, and delayed data analysis—the visual monitoring solution enables truly unattended operation: once installed and calibrated, it runs fully automatically. Its non-contact, automated, and real-time monitoring approach significantly enhances operational efficiency and the timeliness of early warnings. A single system unit can simultaneously track multiple monitoring targets, providing comprehensive coverage of the subgrade cross-section and delivering non-contact, automated, real-time monitoring with sub-millimeter measurement accuracy at distances of up to 400 meters. The platform displays settlement and horizontal displacement curves for each monitoring point in real time and automatically issues alerts when anomalies are detected, thereby effectively improving the efficiency and reliability of structural safety monitoring for railway subgrades and advancing railway infrastructure maintenance toward intelligent, preventive management.
Contact Information
6th Floor, Building 10, Entrepreneurship Industrial Park, Chaoyang Township, Qixing District, Guilin City, Guangxi Zhuang Autonomous Region
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