In Situ Stiffness Profiling using High Resolution Fiber Optic Distributed Sensing

Assaf Klar, Shun Uchida, Eyal Levenberg

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper explores the possibility of using high-resolution fiber-optic distributed sensing for in situ geotechnical estimation of soil shear modulus distribution with depth. It is shown that a recursive analysis of an elastic problem together with a measured vertical strain can assist in evaluating the sought stiffness values. It is suggested that high-resolution fiber-optic distributed sensing can provide the necessary strain for the proposed process. The approach was demonstrated in a field trial, entailing a stratified soil profile including a thin sand layer encapsulated between two clay layers. Results of the suggested profiling method are compared against data from a geophysical survey and against correlations with conventional in situ testing. Excellent agreement is exhibited between the different methods, indicating aptitude and viability of the idea for implementation as a geotechnical investigative tool.
Original languageEnglish
JournalJournal of Geotechnical and Geoenvironmental Engineering
Number of pages9
ISSN1090-0241
DOIs
Publication statusPublished - 2016
Externally publishedYes

Bibliographical note

© 2016 American Society of Civil Engineers

Keywords

  • In Situ Testing
  • Elastic Modulus
  • Fiber-optic Sensing
  • Field Measurements
  • Inverse Analysis

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