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In situ horizontal stress from CPT in sand: a new approach

Ahmadi, M. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1080/19386362.2017.1371932
  3. Abstract:
  4. Despite the various approaches in the literature adopted for analysing cone penetration test (CPT), determination of the initial horizontal stress and relative density of a sandy soil during this test has not been tackled yet. In order to propose a new method in this regard, a numerical study of CPT has been performed and the predicted results have been compared with several databases of comprehensive calibration chamber tests. The penetration mechanism has been then fully investigated by presenting different kinds of outputs for the surrounding soil. Finally, an innovative procedure has been suggested for estimating the initial horizontal stress and relative density during performing CPT in a sandy soil. The suggested method is based on recording the time of occurrence of a pre-specified displacement in the surrounding soil during the test. This recording can be carried out using high-precision digital inclinometer systems which are mounted in some boreholes in different directions and various distances around the location of CPT. © 2017 Informa UK Limited, trading as Taylor & Francis Group
  5. Keywords:
  6. CPT ; Horizontal stress ; Numerical modelling ; Relative density ; Sand ; Verification
  7. Source: International Journal of Geotechnical Engineering ; 2017 , Pages 1-9 ; 19386362 (ISSN)
  8. URL: https://www.tandfonline.com/doi/abs/10.1080/19386362.2017.1371932