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Study on Underground Sewage Pipeline Temperature Based on OFDR Technology and Numerical Simulation Methods
Lei Gao1, Xinyu Wu1, Zhuodi Zheng1
1Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China.
Sensors (Basel, Switzerland)
|February 27, 2026
Summary
Underground sewage pipeline temperatures are slowly rising, with a maximum change of 0.55°C observed. This research provides key insights into pipeline thermal behavior for safe urban infrastructure operation.
Area of Science:
- Civil Engineering
- Environmental Engineering
- Geotechnical Engineering
Background:
- Underground sewage pipelines are critical urban infrastructure.
- Pipeline temperature significantly impacts the safe operation of sewage systems.
Purpose of the Study:
- To monitor and analyze the temperature variations in an underground sewage pipeline.
- To explore the spatiotemporal distribution of sewage pipeline temperatures.
- To provide a reference for future research on sewage pipeline thermal management.
Main Methods:
- Conducted in-situ temperature monitoring experiments on a sewage pipeline in Nanjing.
- Utilized Optical Frequency Domain Reflectometry (OFDR) for temperature data acquisition.
- Employed numerical simulation methods to study temperature variations.
Main Results:
- Observed a continuous, slow upward trend in underground sewage pipeline temperatures.
- Recorded a maximum temperature change of 0.55°C.
- Numerical simulation results aligned with the experimental monitoring data.
Conclusions:
- The study successfully characterized the thermal behavior of the underground sewage pipeline.
- Findings confirm the slow temperature increase and provide valuable data for infrastructure safety.
- The integrated approach of experimental monitoring and numerical simulation is effective for pipeline temperature analysis.
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