Effect of soil amendments on the compaction characteristics, hydraulic conductivity, and tire sinkage potential of roadside soils

State highway agencies (SHAs) are required to comply with the National Pollution Discharge Elimination Permit (NPDES), which requires that the majority stormwater runoff from highways infiltrate into the roadside and that agencies implement soil based best management practices (BMPs). Per this new permit, SHAs are to install soil based BMPs that can absorb the 85th percentile of a 24-hour stormwater event. The area used for this purpose is typically the road embankments/slopes located adjacent to the roadside, best known as Clear Recovery Zone (CRZ). The CRZ must be traversable and recoverable to meet roadside traffic safety standards. A major concern for SHAs is the uncertainty on how these BMPs will affect the safety of a vehicle should that vehicle leave the roadway and interact with the soft soils. Considering this concern, the study described in this paper has assessed the impact of soil amendments on the compaction characteristics, hydraulic conductivity, and sinkage potential of six native soils of the state of California. These six soils were amended with four of the most used BMPs by the California State of Transportation (Caltrans). The results showed the hydraulic conductivity drops when the percentage of organic matter increases in the soil. They also showed that soils with a soaked surface had much larger sinkage than soils with an intact surface, this sinkage potential increase at the soak condition is proportional to the soil’s clay content.

• Record URL:
  • https://doi.org/10.1016/j.trgeo.2023.101019
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S2214391223000922
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/22143912
• Supplemental Notes:
  • © 2023 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Goenaga, Boris
  • Underwood, B Shane
  • 0000-0002-7223-3968
  • Tirkolaei, Hamed
  • Neithalath, Narayanan
• Publication Date: 2023-7

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 101019
• Serial:
  • Transportation Geotechnics
  • Volume: 41
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 2214-3912
  • Serial URL: http://www.sciencedirect.com/science/journal/22143912

Subject/Index Terms

• TRT Terms: Best practices; Drainage; Permeability coefficient; Roadside; Soil compaction; Soil components
• Identifier Terms: California Department of Transportation
• Geographic Terms: California
• Subject Areas: Environment; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 01886342
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 2023 4:29PM