Experimental investigation on pipe-soil interaction due to ground subsidence via high-resolution fiber optic sensing

Li, Haojie; Zhu, Hong‐Hu; Wu, Haiyan; Zhu, Bin; Shi, Bin

doi:10.1016/j.tust.2022.104586

Cited by 30 publications

(5 citation statements)

References 45 publications

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“…Determining the mechanism of the pipe-soil interaction is the key to obtaining the stress state of the buried pipeline crossing the fault. The pipe-soil interaction changes gradually with the increase of the fault displacement (δ) [32][33][34][35] . Take the normal fault as an example, whose hanging wall moves downward relative to the foot wall.…”

Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

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With the large-scale construction of oil and gas pipelines, the safety issues of long-distance buried pipelines in the service and construction have become increasingly prominent. The complex geological and topographical conditions of the special zone will put forwards extremely high requirements on pipe trench laying backfill materials and construction technology. For example, pipelines are inevitable to cross the active fault, while the trench backfilled with soil has limitations in protecting them from failure under the active fault displacement caused by the earthquake. Therefore, it is necessary to study the pipe–soil interaction mechanism, determine the stress state of the pipeline and propose a new backfilling material that can protect the pipeline from failure. Foam concrete (FC) provides a new choice to backfill the buried pipeline trench due to its high-homogeneity, lightweight, controllable-strength, and self-compacting. To further determine the applicability of the FC, the pipe-FC interaction mechanism is studied. Then, a FE model of the FC-pipeline-soil interaction system is established by Abaqus to quantitatively analyze the applicability of the FC based on the experimental data of the mechanical performance of the FC. It proves that using FC as trench backfill material has a noticeable protective effect on the pipeline under the earthquake-induced displacement of the normal fault. Furthermore, FC has a better protective effect on the pipeline subjected to compressive than tensile. Therefore, the reference for applying FC in trench backfilling of pipelines crossing normal fault is provided.

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Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

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“…DFOS technology can detect the dynamic drift of the backscattered light peak wavelength, reflecting changes in physical parameters such as temperature, strain, and vibration along the length of the fiber. 49 By analyzing these changes, measurements of external parameters can be achieved. Different monitoring systems have been developed based on different scattering principles, namely, DTS, DSS, and DAS.…”

Section: Principles and Characteristics Of Fiber Optic Sensingmentioning

confidence: 99%

“…This enables sensing of the external temperature field or strain field. DFOS technology can detect the dynamic drift of the backscattered light peak wavelength, reflecting changes in physical parameters such as temperature, strain, and vibration along the length of the fiber 49 . By analyzing these changes, measurements of external parameters can be achieved.…”

Section: Principles and Characteristics Of Fiber Optic Sensingmentioning

confidence: 99%

A critical review of distributed fiber optic sensing applied to geologic carbon dioxide storage

Liu,

Li,

et al. 2024

Greenhouse Gases

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In the context of global climate change, carbon capture and storage (CCS) has become a direct and effective measure for reducing greenhouse gases emission. However, injecting CO2 into the subsurface reservoirs may pose risks related to geological hazards. Therefore, monitoring the variations in underground temperature fields, strain fields, and vibration fields induced by CO2 injection is essential for predicting and controlling geological hazards. Distributed fiber optic sensing (DFOS) technology, with its unique features, enables real‐time monitoring of temperature, strain, and vibration. By deploying fiber optic (FO) cables inside wellbores, a DFOS can be used to effectively capture multiple underground response parameters. This paper reviews the applications of DFOS technology in CO2 geological sequestration. The chapter covers aspects such as the literature review, principles and applications of fiber optics, and representative monitoring projects. Finally, the paper discusses the challenges and proposed solutions for DFOS technology in this context. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…However, these methods are not only labor-intensive and inefficient but also challenging to meet the requirements of real-time monitoring. Fiber optic grating sensing technology [3][4][5][6], characterized by its high sensitivity, resistance to electromagnetic interference, and ease of networking, is particularly suitable for operation in environments with strong electromagnetic interference, such as substations. However, traditional FBG-SLMs typically employ wavelength-division multiplexing for networking.…”

Section: Introductionmentioning

confidence: 99%

Settlement monitoring for ultra-long GIS equipment based on weak fiber Bragg grating sensing

Wang,

Zhu,

Zhu

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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With the widespread use of Gas Insulated Switchgear (GIS) in substations, the impact of foundation settlement on the safety of equipment has attracted increasing attention. This paper investigates a weak fiber Bragg grating static level meter (wFBG-SLM) that can be deployed on a large scale. It utilizes wFBG as temperature and pressure-sensitive elements and establishes a network using time-division multiplexing. Hundreds of sensors can be connected to a single fiber, making it particularly suitable for long-term real-time settlement monitoring of ultra-long GIS equipment foundations. A sensitivity of 0.06mm/pm and a long-term monitoring accuracy of ±0.4mm were achieved through analysis and testing of this wFBG-SLM. The system has been applied to monitor the foundation settlement of GIS equipment in a ±800kV Ultra High Voltage (UHV) converter station. The obtained two months of monitoring data align well with manually observed data and this system demonstrates significant value for widespread application in related structures.

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Experimental investigation on pipe-soil interaction due to ground subsidence via high-resolution fiber optic sensing

Cited by 30 publications

References 45 publications

Research on the interaction between trench material and pipeline under fault displacement

Research on the interaction between trench material and pipeline under fault displacement

A critical review of distributed fiber optic sensing applied to geologic carbon dioxide storage

Settlement monitoring for ultra-long GIS equipment based on weak fiber Bragg grating sensing

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