A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of a New Heat Extraction Method to Reduce Permafrost Degradation under Roads and Airfields
One of the main degradation mechanisms of permafrost underlying transportation infrastructures is associated with the geometry of airfields and roadway embankments. The two phenomena that are associated with this mechanism are shoulder rotation and longitudinal cracking. These problems occur on the embankment side-slopes because of the important snow drift in winter, which causes a warming. This warming induces an accelerated thaw of the permafrost table under the shoulder causing a loss of support. In this context, the paper describes a new mitigation method, the heat drain, that was developed to counter permafrost degradation problem on the side-slopes of the embankment. The heat drain was developed by the Groupe de recherche en ingénierie des chaussées de l'Université Laval. This technique allows heat extraction from the embankment during winter. The heat drain consists in a highly permeable geocomposite placed in the shoulder. An air intake is installed at the foot of the embankment in order to allow the upward movement of air in the membrane. The paper summarizes the performance of this new technique. This new method was tested in laboratory and proved to be effective to reduce the ground temperature.
Development of a New Heat Extraction Method to Reduce Permafrost Degradation under Roads and Airfields
One of the main degradation mechanisms of permafrost underlying transportation infrastructures is associated with the geometry of airfields and roadway embankments. The two phenomena that are associated with this mechanism are shoulder rotation and longitudinal cracking. These problems occur on the embankment side-slopes because of the important snow drift in winter, which causes a warming. This warming induces an accelerated thaw of the permafrost table under the shoulder causing a loss of support. In this context, the paper describes a new mitigation method, the heat drain, that was developed to counter permafrost degradation problem on the side-slopes of the embankment. The heat drain was developed by the Groupe de recherche en ingénierie des chaussées de l'Université Laval. This technique allows heat extraction from the embankment during winter. The heat drain consists in a highly permeable geocomposite placed in the shoulder. An air intake is installed at the foot of the embankment in order to allow the upward movement of air in the membrane. The paper summarizes the performance of this new technique. This new method was tested in laboratory and proved to be effective to reduce the ground temperature.
Development of a New Heat Extraction Method to Reduce Permafrost Degradation under Roads and Airfields
Beaulac, I. (author) / Doré, G. (author)
13th International Conference on Cold Regions Engineering ; 2006 ; Orono, Maine, United States
2006-07-14
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2006
| British Library Conference Proceedings | 2006
| NTIS | 1956
Building roads and airfields under battle conditions
| Engineering Index Backfile | 1955
| TIBKAT | 1965