Abstract
This paper aims to evaluate the effect of geogrid stabilization in clean and degraded railway ballast through small-strain stiffness measurement using Bender Element (BE) sensors. Laboratory tests on geogrid-stabilized crushed dolomite ballast with fouling indices (FI) from 0% to 40% were conducted, and the results were compared to unstabilized (control) conditions from the previous literature. The test results indicated that shear wave velocity (Vs) peaked at an FI of 20% for geogrid-stabilized ballast. Further, shear wave velocities were higher in geogrid-stabilized ballast in most cases, indicating that the stiffness was enhanced through geogrid stabilization. The small-strain shear modulus (Gmax) estimated through shear wave velocities was increased by 71.3% in clean ballast and 34.9% in heavily fouled ballast with geogrid stabilization. These findings highlight the potential of BE sensors for continuous and nondestructive monitoring in railway ballast.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 425-433 |
| Number of pages | 9 |
| Journal | Geotechnical Special Publication |
| Volume | 2025-March |
| Issue number | GSP 364 |
| DOIs | |
| State | Published - 2025 |
| Event | Geotechnical Frontiers 2025: Foundations, Retaining Structures, and Geosynthetics - Louisville, United States Duration: Mar 2 2025 → Mar 5 2025 |
ASJC Scopus subject areas
- Civil and Structural Engineering
- Architecture
- Building and Construction
- Geotechnical Engineering and Engineering Geology