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An experimental study: Fiber Bragg grating-hydrothermal cycling integration system for seepage monitoring of rockfill dams
Chen, Jiang1; Cheng, Fei2; Xiong, Feng1; Ge, Qi1; Zhang, Shaojie3
Corresponding Author张少杰
2017
Source PublicationSTRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
ISSN1475-9217
EISSN1741-3168
Volume16Issue:1Pages:50-61
SubtypeArticle
Abstract

In order to make up defects liable for the conventional monitoring of rockfill dam seepage in spatial inconsequence and low efficiency, a new monitoring system is proposed based on the heating technique incorporated in the temperature tracer method, that is, the integrated system of fiber Bragg grating temperature sensing and hydrothermal cycling. The system has a boiler as its heating device, and heated water from boiler is admitted through redistributor and circular warm pipelines, in which fiber Bragg grating sensors are embedded in advance for measuring the water temperature, thereby the seepage behavior is identified from the correlative fields of temperature and seepage. A coefficient ζv, according to Newton’s law of cooling, is then fitted out by pipeline cooling curves and used as a new way to identify the seepage state. The temperature–time–travel curves for the cooling period have proved by calibration tests to be, in general, consistent with the mathematical model of temperature variations under Newton’s law of cooling, thereby to inverting the seepage velocity through the fitting formula of it with ζv. With the test model of concentrative leakage established in regard to the location, amount of leakage passages, and leakage rate, multi-condition tests have been conducted which conclude that the proposed method is capable of positioning leakage and quantifying seepage velocity; therefore, it is valid for seepage monitoring and identification.

; In order to make up defects liable for the conventional monitoring of rockfill dam seepage in spatial inconsequence and low efficiency, a new monitoring system is proposed based on the heating technique incorporated in the temperature tracer method, that is, the integrated system of fiber Bragg grating temperature sensing and hydrothermal cycling. The system has a boiler as its heating device, and heated water from boiler is admitted through redistributor and circular warm pipelines, in which fiber Bragg grating sensors are embedded in advance for measuring the water temperature, thereby the seepage behavior is identified from the correlative fields of temperature and seepage. A coefficient (v), according to Newton's law of cooling, is then fitted out by pipeline cooling curves and used as a new way to identify the seepage state. The temperature-time-travel curves for the cooling period have proved by calibration tests to be, in general, consistent with the mathematical model of temperature variations under Newton's law of cooling, thereby to inverting the seepage velocity through the fitting formula of it with (v). With the test model of concentrative leakage established in regard to the location, amount of leakage passages, and leakage rate, multi-condition tests have been conducted which conclude that the proposed method is capable of positioning leakage and quantifying seepage velocity; therefore, it is valid for seepage monitoring and identification.
KeywordSafety Monitoring Of Rockfill Dams Temperature Tracking Method Optical Fiber Sensing Cycling Hydrothermal Heating Newton's Law Of Cooling
WOS HeadingsScience & Technology ; Technology
DOI10.1177/1475921716661874
WOS Subject ExtendedEngineering ; Instruments & Instrumentation
Indexed BySCI
WOS KeywordTEMPERATURE
Language英语
Quartile2区
TOP
WOS SubjectEngineering, Multidisciplinary ; Instruments & Instrumentation
WOS IDWOS:000391459300004
Funding OrganizationNational foundation fund(51509174) ; Project of Science & Technology Department of Sichuan Province(2015JY0235)
Accession numberAccession number:20165303201092
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17504
Collection山地灾害与地表过程重点实验室
Affiliation1.Sichuan Univ, Coll Architecture & Environm, Chengdu, Peoples R China
2.Sichuan Univ, Coll Light Ind & Text & Food Engn, Chengdu, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Chen, Jiang,Cheng, Fei,Xiong, Feng,et al. An experimental study: Fiber Bragg grating-hydrothermal cycling integration system for seepage monitoring of rockfill dams[J]. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL,2017,16(1):50-61.
APA Chen, Jiang,Cheng, Fei,Xiong, Feng,Ge, Qi,&Zhang, Shaojie.(2017).An experimental study: Fiber Bragg grating-hydrothermal cycling integration system for seepage monitoring of rockfill dams.STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL,16(1),50-61.
MLA Chen, Jiang,et al."An experimental study: Fiber Bragg grating-hydrothermal cycling integration system for seepage monitoring of rockfill dams".STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL 16.1(2017):50-61.
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