Experimental Investigation of Acoustic Signal Characteristics of Blockages in Highway Tunnel Drainage Pipelines Using Distributed Acoustic Sensing
Source abstract
Abstract
This study aims to quantitatively assess blockage conditions in highway tunnel drainage pipelines using acoustic wave signals. A full-scale physical model of a drainage pipeline was constructed to simulate six blockage ratio conditions ranging from 12.5% to 75%. Distributed Acoustic Sensing (DAS) technology was employed to collect acoustic signals along the pipeline. Time-domain analysis and Fast Fourier Transform (FFT)-based frequency-domain analysis were conducted to compare the waveform amplitude and dominant frequency components between blocked and unobstructed pipeline sections. The results demonstrate a significant increase in time-domain amplitude at the blockage location, with a maximum enhancement of up to 50% compared to unobstructed sections. In the frequency domain, this phenomenon is particularly pronounced within specific dominant frequency bands (core frequency bands). For instance, the 395–405 Hz band was identified as the core band under the 50% blockage ratio condition. Furthermore, the time-domain amplitude at the blockage shows a positive correlation with the blockage ratio (12.5–75%). The comprehensive analysis indicates that the time-domain characteristics of DAS-based acoustic signals can effectively identify both the location and severity of blockages in highway tunnel drainage pipelines. This research provides fundamental data for evaluating the blockage state of tunnel drainage systems based on acoustic signatures.
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Research context
OpenAlex topics: Water Systems and Optimization · Geotechnical Engineering and Underground Structures · Seismic Waves and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research Institute of Highway Ministry of Transport, Beijing 100088, China
College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Research Center of Tunneling and Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Funding
Basic Research Fund of Central Research Institute · Central Government Guides Local Science and Technology Development Fund Project · Open Fund of Engineering Research Center for Tunnel and Underground Engineering, Ministry of Education
References (27)
Show source-provided references
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