The second Geotechnical Asset Management Peer Exchange (GAMPE) was held at the Renaissance
Hotel in Asheville, North Carolina on May 26, 2022. The peer exchange report is available here. Preface: The 2nd Geotechnical Asset Management Peer Exchange (GAMPE) was held at the Renaissance Hotel in Asheville, North Carolina on May 26, 2022 following the 71st annual Highway Geology Symposium and the TRB midyear committee meeting earlier in the week. These events brought together people interested in the deployment of Geotechnical Asset management (GAM) to improve safety and mobility on the nation’s transportation corridors. The first GAMPE was held at the headquarters of the College of Engineers and Surveyors of Puerto Rico in San Juan, Puerto Rico on August 27 and 29, 2019, and was organized by the Puerto Rico Highway and Transportation Authority and the Federal Highway Administration. Similar to the first exchange, the focus of the 2022 event was to increase awareness and knowledge of current GAM practices through real-world examples and lessons learned shared and discussed among participants. Discussions also included current trends, future plans, and resource needs for GAM implementation. The GAMPE event was held from 8:00 AM to 4:00 PM, and involved introductory and closing remarks from the organizers, updates from several state transportation agencies regarding ongoing GAM efforts, and a mix of whole-group and breakout discussions. Representatives and spokespersons from the Federal Highway Administration (FHWA), state transportation agencies, and private engineering firms participated in the discussions.
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Alberta published results from a GAM-focused pilot study.
Abstract: Tetra Tech Canada Inc. was retained by Alberta Transportation (AT) to assist in the development of a risk-based Geotechnical Asset Management (GAM) framework and pilot study, with the vision of transforming AT’s current Geohazard Risk Management Program (GRMP) into a GAM program. The main objectives of the study were to develop a GAM framework for managing selected geotechnical assets located along the Provincial highway system, and to develop a spreadsheet tool for implementing this framework to a pilot-scale inventory of 27 geotechnical assets. The intent of the GAM framework development was to enhance AT’s ability to effectively prioritize, measure, and manage life-cycle investments in assets such as slopes, embankments, retaining walls and subgrades, based on performance expectations and risk tolerance. The GAM Framework Development and Pilot Study was undertaken in a manner consistent with the methodology and recommendations of NCHRP Report 903: Geotechnical Asset Management for Transportation Agencies (2019), which includes a supporting computational tool implemented in Microsoft Excel, that was customized as part of the project. The tool includes economic analyses based on annual monetized risk and life-cycle costs over a 50-year time period, through monetizing the asset-specific costs and benefits associated with the recommended treatment, applied in the optimal year. A collaborative and highly-interactive approach was essential to the project delivery, with AT’s Geotechnical Asset Management Specialist involved as one of the key team members during all stages of the project. The customized “GAM Planner” application provides an integrated solution for collecting, storing, and managing information on Alberta’s geotechnical highways assets, in one Excel-based application which can be used for capital planning and the prioritization of rehabilitation projects on an annual basis. The GAM Planner was modified from the original NCHRP tool, to reflect AT's agency-specific requirements regarding inventory, treatments, inspection requirements, site-specific user cost model, risk-based life cycle plan, incorporation of monetized risk, site-specific traffic, site-specific detour length, provincial highway classification, field inspection report, and other additional enhancements. 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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January 2023
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