Benoit Lorangerbl2

Direction : Guy Doré
Co-direction : Daniel Fortier

Adresse principale
Département de Génie Civil et de Génie des eaux
Faculté de Science et de Génie
Pavilllon Adrien-Pouliot, local 2966
Université Laval
1065 Av. de la Médecine
Québec, Qc, Canada, H1V 0A6

Courriel :

Project title

Using the gravimetric geophysical technique for massive ice and ice-rich soils detection purposes in permafrost environment.


Project description

The unstable land areas due to thawing of warm sensitive permafrost pose a risk to the integrity of transport infrastructure and should be identified and characterized. A warm permafrost, ice-rich and present at shallow depths is the most difficult terrain condition to manage the construction and maintenance of transport infrastructure in the north. The spatial distribution of massive ice body and ice-rich soil structures is very difficult to predict, especially where surface material and / or soil types vary widely.

The research project aims to investigate problematic linear infrastructures sites in permafrost areas and try to detect massive ice or ice-rich soils in order to apply adapted design, maintenance and construction techniques. More specifically, the project uses a geophysical method of massive ice detection and buried ice-rich soils by geophysical technique called microgravimetry.. This study fits within the Arquluk research program at Laval University.
Microgravimetric method is intended to detect variations of material’s densities indifferent soil. Since the ice is around half the density of the surrounding soil, it is expected that it will be possible to detect gravity negative anomalies corresponding to the presence of buried massive ice. A gravimeter Scintrex (CG5) is used for data acquisition.

The research project was carried out at two sites in the Yukon (Canada), specifically at Dry Creek and Beaver Creek, and as well in Greenland (Denmark) near Kangerlussuaq, around and on the ice sheet.



Permafrost, gravimetry, geophysics, Nordic engineering infrastructure.

International Scientific Conferences

Loranger, B., Doré, G., Fortier, D. and Lemieux, C. (2015). Massive Ice and Ice-Rich Soil Detection by Gravimetric Surveying at Dry Creek, South-Western Yukon Territory, Canada (2015). 16th International Conference on Cold Regions Engineering (ICCRE a/s ASCE), Salt Lake City, Utah, USA, 19-22 July, 2015. 12p.


National Scientific Conferences

Oldenberg, G.A., LeBlanc, A.M., Stevens, C.W., Chartrand, J. and Loranger, B. (2015). Geophysical Imaging of Permafrost Conditions along the Northern Yukon Alaska Highway (Submitted). 68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference, Quebec City, Quebec, Canada. September 20-23, 2015. 8p.


Provincial Scientific Conference/ workshops

Loranger, B. Doré, G., (2015) Detection of massive ice and ice-rich permafrost in a glacial plain spreading using the gravimetric technique to Dry Creek site, Yukon.
Annual Conference of the Centre for Northern Studies, 12-13 February 2015, Laval University, Quebec, QC, Canada, Oral Presentation.

Loranger, B., Doré, G., (2015) Massive Ice Detection by Gravimetric Surveying at Dry Creek, Yukon Territory, Canada. 6th Annual Worshop of the Permafrost Network of Expertise, Transport Canada, 14-17 juin 2015, Nunavik, QC, Canada, Oral Presentation.


Scientific reports

Loranger, B., (2015) Hazard Project: Thaw Consolidation Expertise for hazard mapping and soils characterization: Old Crow, YT, Canada. Northern Climate Exchange, Yukon Research Center, Yukon College, Whitehorse, YT, Canada. 79 p.

Loranger, B. and Lemieux, C. (2014) Landscape Hazards Project: Thaw Consolidation Expertise for hazard mapping and soils characterization: Burwash Landing & Destruction Bay, YT, Canada. Northern Climate Exchange, Yukon Research Center, Yukon College, Whitehorse, YT, Canada. 72 p.

M-Lepage, J., and Loranger, B. (2013). Safe Construction on Permafrost. In: Burwash Landing and Destruction Bay Landscape Hazards: Geological Mapping for Climate Change Adaptation Planning, Northern Climate ExChange, Yukon Research Centre, Yukon College, Whitehorse, Yukon Territory. Revised 2015. Appendix F: 99-111

Loranger, B. and Doré, G. (2011). Loranger, B.. 2011. Thermal performance of light color surfaces pavement to protect road embankments built on unstable permafrost. Université Laval, Quebec City, Quebec, Canada. 33 p.


Scholarships and other awards:

Transportation Association of Canada Foundation (ATC). Canadian Council of Independent Laboratories (CCLI). Fall 2015.



Junior Member , Ordre des ingénieurs du Québec (OIQ), (Quebec Engineer association)
Canadian Geotechnical Society (CGS)
Geological Association of Canada (GAC)
Centre for Northern Studies (CEN)

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