详情

Advancing Subsurface Explorations Beyond the Borehole

项目名称：	Advancing Subsurface Explorations Beyond the Borehole
摘要：	Geotechnical site characterization sometimes fails to fully characterize the below-ground bedrock surface and hydrologic conditions using conventional borings. By combining geophysical and boring data analysis, transportation projects can produce a more thorough and accurate representation of geotechnical subsurface conditions, reducing the disruption work plans, forced revision of designs, and cost increases from schedule delays, claims, or change orders. The need to bring more geophysics into transportation projects is recognized by the Federal Highway Administrations EDC-5: Advanced Geotechnical Methods in Exploration (A-GaME) initiative. The proposed research will test a number of established geophysical techniques and their correlation with established geotechnical assessments used by the New Hampshire Department of Transportation (NHDOT). Passive Horizontal-to-Vertical Spectral Ratio (HVSR) seismic and multi-frequency electromagnetic induction geophysical methods can be rapidly deployed and are well suited to enhance geotechnical cross sections generated with conventional borings and compliment other geophysical methods already in use by DOTs. Measurements of specific conductance of and depth to water along with direct-current resistivity of split spoon samples from borings will be used to help calibrate interpretations of geophysical data where feasible. This effort will contribute to the overall goal of improving efficiency of NHDOT increasing delivery time of subsurface conditions and decreasing the time it takes to complete.
状态：	Proposed
资金：	$170,000
资助组织：	New Hampshire Department of Transportation
项目负责人：	Nash, Deirdre
执行机构：	United States Geological Survey
开始时间：	20201101
预计完成日期：	20221231
主题领域：	Bridges and other structures；Geotechnology