Proceedings of the 45th Annual Conference on Deep Foundations, 2020 - ONLINE , (DFI)
Bring Your A-GaME! The Benefits of Advocating for Advanced Geotechnical Exploration Methods
Mary C. Nodine, Benjamin Rivers, Derrick Dasenbrock
Up to 50 percent of major infrastructure projects suffer impacts to schedule or cost due to geotechnical issues, many of which correspond to risks related directly or indirectly to the scope and quality of site characterization work. The Federal Highway Administration (FHWA) in coordination with industry organizations seeks to address this issue through Every Day Counts (EDC), a program that identifies and deploys proven, yet underutilized innovations at the project level to save time, money and resources. The A-GaME (Advanced Geotechnical Methods in Exploration) is one of the innovations supported under EDC. Current practice for characterizing project sites, particularly for public highway and bridge work, is largely predicated on historically published prescriptive minimum requirements within American Association of State Highway Transportation Officials (AASHTO) and FHWA guidance documents. As a result, explorations are often limited to what is needed to satisfy minimum requirements, such as drilling a minimum number of borings with samples obtained at 5-ft intervals. Unfortunately, making decisions with incomplete or limited geotechnical information can result in costly constructability problems and claims. The A-GaME implementation team seeks to raise awareness of proven, effective and underutilized technologies that, when combined with processes that assess risk and variability, allow optimization of subsurface characterization programs for improved site characterization and maximum return-oninvestment. Appropriate use of these methods can reduce uncertainty about site conditions and potentially improve construction process and reduce construction claims. The highlighted technologies are as follows: • Cone penetration testing • Seismic and electrical geophysics • Measurement while drilling • Optical and acoustic televiewers This paper presents an overview of the A-GaME program, information about each of the highlighted methods, and a case history that illustrates the benefits of bringing your A-GaME.
|article #3674; publication #1073 (AM-2020)|