IDEAS home Printed from https://ideas.repec.org/a/spr/nathaz/v117y2023i1d10.1007_s11069-023-05872-8.html
   My bibliography  Save this article

A numerical simulation using FLAC3D to analyze the impact of concealed karstic caves on the behavior of adjacent tunnels

Author

Listed:
  • M. Mahmoudi

    (University of Qom)

  • Ali M. Rajabi

    (University of Tehran)

Abstract

The presence of karst cavities near the tunnels has a great impact on the behavior and deformation of the tunnels, making it necessary to study the impact of these cavities before starting the tunnel operation. A finite difference software (FLAC3D) was used to study the modeling of tunnels adjacent to karst caves and examine the effect of location, size, distance, shape, and arrangement of caves on displacements, bending moment, and axial force of the tunnel lining. In this study, an attempt has been made to investigate the effect of these karst cavities on the tunnel by approximate modeling of karst cavities around Shiraz-Bushehr railway tunnel. The results show that by increasing the dimensions of the karst cave, the axial force (N) increases when the cave is located below, top, and at the side of the tunnel, respectively. Moreover, when the cave is located below, top, or at the side of the tunnel, the bending moment decreases and increases, respectively. As the distance of the cave increases in the below of the tunnel span, the displacement of the tunnel ceiling increases, while the bending moment and axial force increase and decrease, respectively, depending on the size of the cave. With changing the location of the cave at a certain distance from the span toward the end of the tunnel, the displacement of the tunnel ceiling, bending moment, and axial force of the tunnel lining would decrease.

Suggested Citation

  • M. Mahmoudi & Ali M. Rajabi, 2023. "A numerical simulation using FLAC3D to analyze the impact of concealed karstic caves on the behavior of adjacent tunnels," 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. 117(1), pages 555-577, May.
    • Handle: RePEc:spr:nathaz:v:117:y:2023:i:1:d:10.1007_s11069-023-05872-8
    DOI: 10.1007/s11069-023-05872-8
    as

    Download full text from publisher

    File URL: http://link.springer.com/10.1007/s11069-023-05872-8
    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/s11069-023-05872-8?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:117:y:2023:i:1:d:10.1007_s11069-023-05872-8. 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.