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Development of Design Profiles & Parameters using Measurement While Drilling (MWD) and Permeafor Data

The New Hampshire Department of Transportation (NHDOT) has recently invested in two new technologies to improve geotechnical site characterization for stormwater best management practices (BMPs) and to improve the efficiency and accuracy of geotechnical subsurface models for bridge and roadway designs. The need for time consuming borehole infiltration testing and standard penetration testing may be reduced through further deployment of Permeafor and Measurement While Drilling (MWD). This project will advance integration of these technologies by ensuring current hardware, software, and data analysis methods are updated with best available methods. It will also assist in installation and troubleshooting of new equipment on a recently acquired drill rig, train field staff on the use and care of these technologies, and train technical staff on data reduction and interpretation of results. Specifications will be proposed for inclusion in the NHDOT Geotechnical Manual. This project builds upon work conducted under previous Projects 26962 and 42372F which led to significant improvements in the capabilities of the NHDOT Geotechnical section to meet their needs for the design of various structures across New Hampshire. These efforts will support more efficient use of design and construction resources, reduce the chance of delays due to unexpected subsurface conditions, and potentially help reduce the time associated with conventional subsurface investigation programs in the long term.