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Safety monitoring of underground steel pipeline subjected to soil deformation using wireless inclinometers

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Abstract

Failures occurring in buried pipelines are usually associated with structural damages externally induced by surface loading or permanent ground deformation. In the framework of structural health monitoring, this paper presents a real-time monitoring technique for safety evaluation of continuously welded underground pipelines subjected to soil deformation using dual axis wireless inclinometers. Based on the multiple inclination measurements, a new algorithm combined with indirect adjustment theory and the general solution of the differential equation of beam model on elastic foundation are developed to reconstruct the rotation equation. The deflection curve is then derived to locate the abnormal surface loading and permanent ground deformation. Stress is also calculated to evaluate the performance of the buried pipeline. Numerical simulations verify that the proposed algorithm is of high precision to reconstruct the rotation equation as well as to calculate the deflection and strain. Based on error analysis, comparative studies between the traditional leveling method and the proposed method are conducted and verify the ascendency of the new technique. Field testing on a 24-m-long buried steel pipe equipped with wireless inclinometers is finally carried out and validates the effectiveness to locate the external interference and evaluate the safety of buried pipeline.

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Acknowledgments

The authors are grateful to the State Key Laboratory of Disaster Reduction in Civil Engineering (Project: SLDRCE14-B-19) and the Fok Ying-Tong Education Foundation, China (Grant No. 142004) for the financial support of this work.

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Authors and Affiliations

  1. College of Civil Engineering and the State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Siping 1239, Shanghai, 200092, China

    Suzhen Li

  2. College of Civil Engineering, Tongji University, Siping 1239, Shanghai, 200092, China

    Suzhen Li & Xinghua Peng

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  1. Suzhen Li
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  2. Xinghua Peng
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Correspondence to Suzhen Li.

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Li, S., Peng, X. Safety monitoring of underground steel pipeline subjected to soil deformation using wireless inclinometers. J Civil Struct Health Monit 6, 739–749 (2016). https://doi.org/10.1007/s13349-016-0194-3

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  • DOI: https://doi.org/10.1007/s13349-016-0194-3

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