IDEAS home Printed from https://ideas.repec.org/a/spr/nathaz/v109y2021i1d10.1007_s11069-021-04842-2.html
   My bibliography  Save this article

Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient

Author

Listed:
  • Liang Chen

    (Hohai University
    Geotechnical Research Institute of Hohai University)

  • Yu Wan

    (Hohai University
    Geotechnical Research Institute of Hohai University)

  • Jian-Jian He

    (Zhejiang University
    Zhejiang University
    Zhejiang University)

  • Chun-Mu Luo

    (State Grid Changzhou City Jintan District Electric Power Supply Company)

  • Shu-Fa Yan

    (Hohai University
    Geotechnical Research Institute of Hohai University)

  • Xian-Feng He

    (Yellow River Institute of Hydraulic Research)

Abstract

Suffusion is an important mechanism initiating internal erosion in geotechnical structures. This paper studies the suffusion mechanism of gap-graded soils during the whole suffusion process under an exceedance hydraulic gradient. We define the exceeded critical ratio Ri and study the change in the parameters such as the flow velocity, hydraulic conductivity, and fine particle loss with Ri. Under steady flow, a formula for determining the flow velocity state of the sample with Ri according to the fine particle content and relative density of the sample was proposed; during the suffusion process, the influence of Rimax on the rate at which the flow velocity and hydraulic conductivity of the sample increase as Ri decreases was greater than that of the initial relative density and the initial fine particle content of the sample. Under unsteady flow, a larger initial relative density corresponds to a smaller amplitude of increase in the average value of the peak flow velocity with increasing Ri. Compared with the test under steady flow, the flow velocity under unsteady flow would experience abrupt changes. The relative position of the trend line L of the flow velocity varying with Ri under unsteady flow and the fixed peak water head height point A under steady flow was related to the relative density of the sample.

Suggested Citation

  • Liang Chen & Yu Wan & Jian-Jian He & Chun-Mu Luo & Shu-Fa Yan & Xian-Feng He, 2021. "Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 109(1), pages 405-439, October.
    • Handle: RePEc:spr:nathaz:v:109:y:2021:i:1:d:10.1007_s11069-021-04842-2
    DOI: 10.1007/s11069-021-04842-2
    as

    Download full text from publisher

    File URL: http://link.springer.com/10.1007/s11069-021-04842-2
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1007/s11069-021-04842-2?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:spr:nathaz:v:109:y:2021:i:1:d:10.1007_s11069-021-04842-2. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.springer.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.