ORIGINAL RESEARCH article
Front. Phys.
Sec. Interdisciplinary Physics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1679726
Research on the feasibility of distributed vibration sensing technology for leakage detection in diaphragm wall joint
Provisionally accepted
- 1Suzhou Rail Transit Construction Co., Ltd., Suzhou, China
- 2Suzhou NanZee Sensing Technology Co.,Ltd., Suzhou, China
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The integrity of diaphragm walls is of paramount importance to the safety of foundation pits; leakage can readily induce issues such as instability and heave, necessitating efficient and precise detection. This study conducts laboratory model tests based on Distributed Acoustic Sensing (DAS) technology to investigate the applicability of active and passive methods in leakage identification, as well as the effects of leakage magnitude, sensing optical cable layout positions, and boundary conditions. The results indicate that DAS can effectively identify leakage through acoustic vibration characteristics: the passive method exhibits distinct leakage characteristic signals at 10.25 Hz and 20.25 Hz, with leakage velocity showing a linear positive correlation with peak amplitude; the active method identifies leakage via an external vibration source, and when the spacing between the sensing optical cable and the leakage channel exceeds 50 cm or the channel depth is less than 5 cm, signal attenuation occurs and distinguishability decreases. This study validates the feasibility of DAS technology, providing a scientific basis for real-time distributed leakage detection in foundation pit engineering.
Keywords: Distributed acoustic sensing technology, diaphragm wall, leakage detection, passivemethod, Active method
Received: 05 Aug 2025; Accepted: 02 Sep 2025.
Copyright: © 2025 Lingyan, Mingyin and Yayong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Chen Mingyin, Suzhou NanZee Sensing Technology Co.,Ltd., Suzhou, China
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