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Title:

Integrated Geophysical Methods for Geotechnical Subsurface Investigations
Cover of Integrated Geophysical Methods for Geotechnical Subsurface Investigations

Accession Number:

01140588

Record Type:

Monograph

Availability:

National Technical Information Service

5301 Shawnee Road
Alexandria, VA 22312 USA

Abstract:

This research was funded through the New Hampshire Department of Transportation’s (NHDOT's) State Planning and Research (SPR) program and summarizes the NHDOT’s efforts to supplement conventional test borings and exploration techniques through the use of geophysics on several geotechnical projects. The Department’s geotechnical investigations often encounter bedrock or unstable soils at variable depths over short lateral distances. Test borings are point specific and may miss sudden depth changes and variations in the soil and rock properties. Additional borings can be expensive and time consuming and may even result in a more puzzling subsurface interpretation. Site conditions and/or highly conductive soil properties can sometimes limit the use of the NHDOT’s ground penetrating radar equipment, but through the implementation of additional geophysical techniques the Department has enhanced its capabilities. These geophysical investigative techniques have helped alleviate some of the uncertainties that arise when making subsurface interpretations based solely on conventional exploration methods. This report presents both successful and less successful case histories utilizing resistivity imaging and seismic refraction in conjunction with test borings and ground penetrating radar to characterize a geotechnical project’s subsurface conditions. The methods employed in using these geophysical techniques, the results of the geophysical investigations, and how these results were calibrated and verified are presented.

Report Numbers:

FHWA-NH-RD-13733E

Contract Numbers:

13733E, A000(050)

Language:

English

Corporate Authors:

New Hampshire Department of Transportation


Bureau of Materials and Research, P.O. Box 483, 5 Hazen Drive
Concord, NH 03302-0483 USA

Federal Highway Administration

1200 New Jersey Avenue, SE
Washington, DC 20590 USA

Authors:

Fish, Marc
Pelham, Krystle
Lane, Richard
Birckhead, Edward

Pagination:

28p

Publication Date:

2006-1

Edition:

Final Report

Media Type:

Web

Features:

Figures (14) ; Photos (6) ; Tables (2)

Subject Areas:

Geotechnology; Highways; I41: General Soil Surveys

Files:

TRIS, USDOT, STATEDOT

Last Modified:

Feb 12 2010 9:36PM