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

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• 作者：Suzhen Li ; Xinghua Peng
• 关键词：Buried pipeline ; Soil deformation ; Wireless inclinometers ; Safety monitoring
• 刊名：Journal of Civil Structural Health Monitoring
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：6
• 期：4
• 页码：739-749
• 全文大小：3,104 KB
• 刊物主题：Civil Engineering; Measurement Science and Instrumentation; Vibration, Dynamical Systems, Control;
• 出版者：Springer Berlin Heidelberg
• ISSN：2190-5479
• 卷排序：6

文摘

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.