Advanced geotechnical monitoring of prefabricated vertical drains in soft clay

Tarek Abdoun, Victoria Bennett, Matthew Barendse

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The work presented in this paper identifies the advantages of using autonomous monitoring at construction sites utilizing ground improvement techniques. The Shape-Acceleration Array (SAA) utilizes Micro-Electro-Mechanical Systems (MEMS) technologies. The SAA is capable of measuring in situ (field) 3D ground deformation every 0.305 meters and 3D soil vibration at 2.4 m intervals up to a depth of one hundred meters. The system accuracy of the SAA is ±1.5 mm per 30 m; an empirically derived specification from a large number of datasets. This sensor array can be installed vertically, in a method similar to that used for traditional inclinometer casing, or horizontally. Each sensor array is connected to a wireless sensor node to enable real-time monitoring as well as remote sensor configuration. This paper presents the performance monitoring of a full-scale embankment constructed on a thirty-meter deposit of soft clay at a bridge replacement site in upstate New York. Prefabricated vertical drains (PVDs) and surcharge loads were used at this site to accelerate the consolidation of the soft clay deposit. Two thirty meter long SAAs were used to monitor the horizontal and vertical movement of the embankment. Comparative results between the SAA systems and traditional instrumentation are also presented.

    Original languageEnglish (US)
    Title of host publicationGeotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
    Pages361-366
    Number of pages6
    DOIs
    StatePublished - Nov 16 2010
    EventInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 - Singapore, Singapore
    Duration: Dec 9 2009Dec 12 2009

    Other

    OtherInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
    CountrySingapore
    CitySingapore
    Period12/9/0912/12/09

    Fingerprint

    soft clay
    drain
    Clay
    Monitoring
    Embankments
    Sensor arrays
    monitoring
    sensor
    Clay deposits
    embankment
    Sensor nodes
    Consolidation
    ground improvement
    vertical movement
    Specifications
    Soils
    instrumentation
    consolidation
    vibration
    Sensors

    Keywords

    • Construction monitoring
    • MEMS
    • Settlement
    • Vertical drains

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

    Cite this

    Abdoun, T., Bennett, V., & Barendse, M. (2010). Advanced geotechnical monitoring of prefabricated vertical drains in soft clay. In Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 (pp. 361-366) https://doi.org/10.3850/GI023

    Advanced geotechnical monitoring of prefabricated vertical drains in soft clay. / Abdoun, Tarek; Bennett, Victoria; Barendse, Matthew.

    Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. p. 361-366.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abdoun, T, Bennett, V & Barendse, M 2010, Advanced geotechnical monitoring of prefabricated vertical drains in soft clay. in Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. pp. 361-366, International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09, Singapore, Singapore, 12/9/09. https://doi.org/10.3850/GI023
    Abdoun T, Bennett V, Barendse M. Advanced geotechnical monitoring of prefabricated vertical drains in soft clay. In Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. p. 361-366 https://doi.org/10.3850/GI023
    Abdoun, Tarek ; Bennett, Victoria ; Barendse, Matthew. / Advanced geotechnical monitoring of prefabricated vertical drains in soft clay. Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. pp. 361-366
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