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Title	ENHANCING GEOTECHNICAL INFORMATION WITH GROUND PENETRATING RADAR
Accession No	00928050
Authors	Fish, M; Lane, R
Corp. Authors / Publisher	New Hampshire Department of Transportation ; Federal Highway Administration
Publication Date	20020400
Description	21 p.; Figures; Photos; References(3)
Languages	English
Abstract	A research project was initiated through State Planning and Research funding to learn how well ground penetrating radar (GPR) can supplement or replace conventional test borings. The objective of the research was to determine if GPR could distinguish between and accurately determine the depth to different soil layers, locate the bedrock surface, find and measure the extent of bedrock fractures and subsurface voids, and map river bottom profiles within different locations throughout New Hampshire. GPR investigations were conducted at locations between test borings or where test borings could not be taken because of time constraints or difficulties with drill rig access. To date, GPR has been used as a supplement to the conventional test borings or as a sole source of subsurface information on a total of seventeen geotechnical projects. This report discusses the use of GPR on eight of these seventeen projects and includes sites where GPR was very effective, moderately helpful and of little use. Techniques employed for using GPR, and how the results were calibrated and verified are included in this report.
TRT Terms	Air voids ; Bedrock ; Boreholes ; Geotechnical engineering ; Ground penetrating radar ; Layered soils
Other Terms	River bottom profiles; Subsurface investigations
Subject Areas	H61 EXPLORATION - CLASSIFICATION (SOILS); I41 General Soil Surveys
Contract Number	SPR-0004(025)
Report Number	FHWA-NH-RD-12323U,; Final Report
Availability	National Technical Information Service
URLs	Document: http://www.nh.gov/dot/bureaus/materialsandresearch/research/projects/projects/documents/12323U_geotechgpr.pdf Summary: http://www.nh.gov/dot/bureaus/materialsandresearch/research/projects/projects/documents/AppliedGeologyandGeophysicsreduced.pdf
TRIS Files	HRIS
Database	TRIS Online

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