• Login
    View Item 
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Engineering
    • View Item
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Engineering
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Scholarworks@UACommunitiesPublication DateAuthorsTitlesSubjectsTypeThis CollectionPublication DateAuthorsTitlesSubjectsType

    My Account

    Login

    First Time Submitters, Register Here

    Register

    Statistics

    Display statistics

    Creep of grouted anchors in ice-rich silt

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Chen_L_2011.pdf
    Size:
    13.87Mb
    Format:
    PDF
    Download
    Author
    Chen, Liangbiao
    Keyword
    guy anchors
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/11357
    Abstract
    Creep is a critical consideration for designing anchors in ice-rich silt. In this study, creep was evaluated for grouted anchors in ice-rich silt by laboratory tests. A total of nineteen staged-load pullout tests were conducted on smooth grouted anchors. The anchors were loaded until either a tertiary creep stage or the capacity of the load system was reached. Soil temperatures evaluated in this study ranged from 32 °F to 26.6 °F. It was found that the onset of tertiary creep for smooth anchors was around 0.03 inches, which was much smaller than that suggested in the literature for rough anchors (1.0 inch). Given the same shear stress and soil temperature, the observed creep displacement rates for smooth anchors were greater than those given by the existing design guidelines for rough anchors. A new creep model was proposed in which soil temperature was included as an additional variable. Model parameters were developed as a function of soil temperature and moisture contents by using the test data. The model predictions were compared with the laboratory tests. It was found that the creep displacement rates decreased with the decreasing of soil moisture contents and temperature. Based on the analysis of laboratory test data, design charts were provided to give the allowable pullout capacity for smooth anchors in ice-rich silt.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2011
    Table of Contents
    1. Introduction -- 1.1. Objectives of the research -- 1.2. Research methodology -- 2. Literature review -- 2.1. Background on grouted anchors -- 2.2. Creep behavior of grouted anchors -- 2.3. Factors influencing creep of anchors in permafrost -- 2.4. Existing theories for creep in frozen soil -- 2.5. Design for anchor capacity -- 2.6. Anchor load tests in permafrost -- 3. Anchor load tests and test results -- 3.1. Soil preparation -- 3.2. Laboratory creep test setup -- 3.3. Anchor installation methods -- 3.4. Testing procedures -- 3.5. Test results -- 4. Data analysis and discussion -- 4.1. Comparison with rough anchors based on the design guidelines -- 4.2. Development of a time-dependent creep equations -- 4.3. Effect of soil moisture content and temperature -- 4.4. Design example -- 4.5. Design charts -- 5. Conclusions and recommendations -- 5.1. Conclusions -- 5.2. Recommendations -- References -- Appendix A: Anchor load tests in the laboratory -- A.1. Test anchor configurations and fabrications -- A.2. Load frame configurations and calibrations -- A.3. Displacement measurement -- A.4. Testing procedures -- Appendix B: Anchor load test results -- B.1. Load conditions -- B.2. Creep curves from the nineteen load tests -- Appendix C: Data regression results.
    Date
    2011-05
    Type
    Thesis
    Collections
    Engineering

    entitlement

     
    ABOUT US|HELP|BROWSE|ADVANCED SEARCH

    The University of Alaska Fairbanks is an affirmative action/equal opportunity employer and educational institution and is a part of the University of Alaska system.

    ©UAF 2013 - 2023 | Questions? ua-scholarworks@alaska.edu | Last modified: September 25, 2019

    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.