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    Volume 39, Issue 3 (May 2016)

    Application of Fiber Bragg Grating Strain Sensors to a Centrifuge Model of a Jacked Pile in Collapsible Loess

    (Received 17 April 2015; accepted 15 January 2016)

    Published Online: 2016

    CODEN: GTJODJ

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    Abstract

    The use of traditional sensors in a geotechnical centrifuge model test usually causes deviations in the monitoring data. This is because of the mutual interference among centrifugal field electromagnetic waves that is caused by the independent transmission lines. In recent years, the development of fiber Bragg grating (FBG) sensing technology has substantially improved the accuracy and reliability of monitoring the strain and temperature in geotechnical centrifuge model tests. This study follows a series of centrifuge model tests carried out on a 60 g-ton geocentrifuge, with FBG sensing technology used for monitoring the strain on a static pressed pile; the strain is caused by soil collapse around the pile. During the test, an improved packaging and installation method of the quasi-distributed FBG sensor system was employed to monitor the strain of a jacked pile in a loess field with immersion collapse. The model test results show that the proposed FBG-based sensor assembly monitored the strain distribution of the jacked piles effectively, proving that it is a promising solution for strain monitoring in a geotechnical centrifuge test.


    Author Information:

    Weng, X.
    Associate Professor, Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an Univ., Xi'an,

    Zhao, Y.
    Graduate Student, Geotechnical Engineering, Highway Institute, Chang'an Univ., Xi'an,

    Lou, Y.
    Graduate Student, Geotechnical Engineering, Highway Institute, Chang'an Univ., Xi'an,

    Zhan, J.
    Graduate Student, Geotechnical Engineering, Highway Institute, Chang'an Univ., Xi'an,


    Stock #: GTJ20150076

    ISSN:0149-6115

    DOI: 10.1520/GTJ20150076

    Author
    Title Application of Fiber Bragg Grating Strain Sensors to a Centrifuge Model of a Jacked Pile in Collapsible Loess
    Symposium ,
    Committee A06