Geo-Congress 2020
Development of an Infiltration-Drainage Model for Saturated and Unsaturated Soils
Publication: Geo-Congress 2020: Geotechnical Earthquake Engineering and Special Topics (GSP 318)
ABSTRACT
It has long been recognized that excess moisture in the pavement layer when combined with heavy traffic load and moisture-susceptible materials, can significantly reduce the service life of a pavement structure. So far, no pavement design guidelines can provide an accurate, robust, and dynamic infiltration-drainage model that is suitable for both saturated and unsaturated soils under different climatic conditions. This paper aims at proposing a new infiltration-drainage model that is suitable for both saturated and unsaturated soils. The proposed model is based upon Richards’ equation to govern the water flow in saturated and unsaturated soils, with an additional water source term to account for the influence of precipitation and the current water state within the soil. The calibrated model was used to evaluate the influence of rainfall intensity and duration on the drainage performance of a pavement structure.
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Information & Authors
Information
Published In
Geo-Congress 2020: Geotechnical Earthquake Engineering and Special Topics (GSP 318)
Pages: 621 - 629
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8281-0
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
ASCE Technical Topics:
- Design (by type)
- Engineering fundamentals
- Geomechanics
- Geotechnical engineering
- Highway and road design
- Hydrologic engineering
- Hydrology
- Infiltration
- Infrastructure
- Models (by type)
- Pavement design
- Pavements
- Saturated soils
- Sight distances
- Soft soils
- Soil mechanics
- Soil properties
- Soil water
- Soils (by type)
- Structural models
- Traffic models
- Transportation engineering
- Unsaturated soils
- Water and water resources
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