Abstract
The purpose of this study was to contribute to the development of portable measurement devices for characterization and compaction control of unbound pavement layers. The paper presented a proof-of-concept study utilizing a prototype flexible strain sensing plate and a straightforward data interpretation scheme to determine subgrade elastic modulus utilizing recent advances in fiber-optic technology. The approach involved tracking the location of distinct points of zero and minimum strain along fiber-optic cables glued to the flexible plate and relating their shift in location to the changes in the subgrade elastic modulus. For initial validation, the methodology was successfully demonstrated on a simple laboratory-scale setup, utilizing a Plexiglas plate and Polystyrene block to represent the plate and support material, respectively. It was shown that the approach proposed is direct, load-independent, and allows for accurate determination of the elastic modulus, assuming that the plate characteristics are known.
| Original language | English |
|---|---|
| Title of host publication | Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields |
| Editors | Inge Hoff, Helge Mork, Rabbira Saba |
| Number of pages | 9 |
| Volume | 2 |
| Place of Publication | London |
| Publisher | Taylor & Francis |
| Publication date | 2022 |
| Edition | 1st |
| Pages | 223-231 |
| ISBN (Electronic) | 978-1-032-12049-2 |
| DOIs | |
| Publication status | Published - 2022 |
Keywords
- Plate Load Test
- Distributed Fiber-Optic Strain Sensing
- Compaction Control
- Soil-Structure Interaction
- Non-Destructive Testing