• Login
    View Item 
    •   Home
    • Theses & Dissertations
    • 2019 - Mines Theses & Dissertations
    • View Item
    •   Home
    • Theses & Dissertations
    • 2019 - Mines Theses & Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Mines RepositoryCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    Login

    Mines Links

    Arthur Lakes LibraryColorado School of Mines

    Statistics

    Display Statistics

    Investigation of backwards erosion piping by data driven modeling

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Bocovich_mines_0052E_11834.pdf
    Size:
    16.10Mb
    Format:
    PDF
    Download
    Author
    Bocovich, Carolyne
    Advisor
    Mooney, Michael A.
    Date issued
    2019
    Keywords
    data driven modeling
    backwards erosion piping
    inversion
    
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/11124/173375
    Abstract
    This thesis investigates backwards erosion piping (BEP) as a failure mechanism; it focuses on the ability to use pore water pressure (PWP) measurements to (1) monitor, (2) investigate progression of, and (3) better predict BEP. This thesis starts with understanding PWP trends as BEP progresses, analyzed from PWP collected during a full scale experiment. The result is the understanding that the PWP trends are spatially and temporally complex, indicating that BEP does not progress in a spatially linear pattern, such as a longitudinally progressing BEP channel. The comparison of PWP trends from BEP with PWP trends calculated from finite element models corroborate previous findings that BEP does not progress in a simple manner. BEP does not progress smoothly in time nor does it progress symmetrically or only longitudinally (directly from downstream to upstream) in space. This research further provides an understanding that finite element models generate similar trends in PWP as observed during the full scale experiment, suggesting that the use of inversion analysis to predict spatial progression of BEP from PWP measurements is appropriate. The inversion analysis is validated by building synthetic models that simulate BEP in a finite element software, and investigating how the inversion analysis is able to re-create these synthetic models. Once the inversion analysis is validated, PWP measurements from the IJkdijk 2009 Test 2 full scale experiment are used to estimate the spatial progression of BEP at consecutive time steps. The results indicate a highly non-uniform progression of BEP. Multiple BEP channels progress transversely and longitudinally to bulk fluid flow (from upstream to downstream) and appear to progress, halt, and progress again later in time. Observations taken during the full scale experiment corroborate these findings. To complete the thesis, PWP measurements in space and time are used to investigate the ability to use Bayesian updating to decrease understanding of parameters that are spatially heterogeneous and update the prediction of BEP leading to failure.
    Rights
    Copyright of the original work is retained by the author.
    Collections
    2019 - Mines Theses & Dissertations

    entitlement

     
    DSpace software (copyright © 2002 - 2022)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.