WisDOT publishes the Final Report and Research Brief for Geotechnical Asset Management for Slopes (Project ID 0092-21-06)
Abstract: The Wisconsin Department of Transportation (WisDOT) engaged with BGC Engineering Inc. (BGC) as part of the Wisconsin Highway Research Project (WHRP) to develop a Geotechnical Asset Management (GAM) process for slopes along Wisconsin highways using susceptibility mapping and analysis. The study corridor used to develop and validate the process was the Wisconsin Highway 35 Corridor in Crawford county in southwest Wisconsin. The process includes a Geographic Information System (GIS) -based slope failure susceptibility model which considers the hazard factors that lead to slope failures on Wisconsin State Highway 35 (WI-35). The output from the susceptibility model can be used within a GAM framework that provides WisDOT engineers and officials with information to prioritize and plan future projects and maintenance efforts. The methodology employed for this work utilized a statistical approach to slope hazard susceptibility mapping which reduces information extracted from geometric and geospatial data at known hazard locations to quantify slope failure susceptibility along the study corridor. The statistcal approach was validated through field observations and anecdotal information from WisDOT Maintenance staff, and guidance for extrapolation statewide is provided. An interactive web-based map showing the slope failure susceptibility and input data such as terrain and field observation forms was used for the duration of the project.
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