In Situ Stiffness Profiling using High Resolution Fiber Optic Distributed Sensing

Research output: Contribution to journalJournal article – Annual report year: 2016Researchpeer-review

Without internal affiliation

  • Author: Klar, Assaf

    Technion-Israel Institute of Technology, Israel

  • Author: Uchida, Shun

    Rensselaer Polytechnic Institute, United States

  • Author: Levenberg, Eyal

    Technion-Israel Institute of Technology

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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
Publication statusPublished - 2016
Externally publishedYes

Bibliographical note

© 2016 American Society of Civil Engineers

CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

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

ID: 125079443