Prediction and Rehabilitation of Highway Embankment Slope Failures in a Changing Climate

Jafari, Navid H; Puppala, Anand J.; Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6; Louisiana State University (Baton Rouge, La.); University of Texas at Arlington

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Prediction and Rehabilitation of Highway Embankment Slope Failures in a Changing Climate

[PDF-3.77 MB]

English

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Details:

Creators:

Jafari, Navid H ; Puppala, Anand J.

Jafari, Navid H ; Puppala, Anand J. Less -
Corporate Creators:

Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6 ; Louisiana State University (Baton Rouge, La.) ; University of Texas at Arlington

Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6 ; Louisiana State University (Baton Rouge, La.) ; University of Texas at Arlington Less -
Corporate Contributors:

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. University Transportation Centers (UTC) Program

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. University Transportation Centers (UTC) Program Less -
Subject/TRT Terms:

[+]

Clay Soils Climate Change Cracking Embankments Guidelines Highways Lessons Learned Moisture Content Rehabilitation (Maintenance) Shear Strength Slope Failure
Publication/ Report Number:

17GTLSU04
Resource Type:

Tech Report
Geographical Coverage:

Louisiana ; Texas ; United States

Louisiana ; Texas ; United States Less -
Edition:

Final Research Report May 2017 – May 2018
Corporate Publisher:

Transportation Consortium of South-Central States
Abstract:

Highway slopes constructed with clayey soil are prone to desiccation cracks due to wetting and drying weather cycle, which allows greater moisture infiltration into the embankment from precipitation. Fissures formed due to extended wetting and drying cycles allow water to seep deeper into the soil than surficial wetting and increase the water content. This increases the moisture content in the soil and results in reduction in shear strength to the fully softened strength. On the other hand, development of desiccation cracks and reduction of the soil matric suction ultimately result in higher hydraulic conductivity value which causes development of higher pore water pressure. As the moisture content of the clayey soil increases, the strength reduces to a fully softened shear strength that causes frequent shallow and medium slope failures that are oriented approximately parallel to the surface of the embankment. Hence, the fully softened strength of Louisiana and Texas soils need to be quantified to develop a predictive tool for identifying high-risk zones of highway embankments. Given the documented failures in Texas and Louisiana, this research project is focused on investigating past failures to develop lessons learned and guidelines that can be implemented in the predictive framework.
Format:

PDF
Funding:

69A3551747106
Collection(s):

University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:5f350b2ccff9bc230df3e4a4822365e2cc3b7bcdf14840369be88c814a0929a5
Download URL:

https://rosap.ntl.bts.gov/view/dot/62756/dot_62756_DS1.pdf
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Prediction and Rehabilitation of Highway Embankment Slope Failures in a Changing Climate

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