Review of Effectiveness and Costs of Strategies to Improve Roadbed Stability in Permafrost Regions
- 1 September 2013
- journal article
- review article
- Published by American Society of Civil Engineers (ASCE) in Journal of Cold Regions Engineering
- Vol. 27 (3), 109-131
- https://doi.org/10.1061/(asce)cr.1943-5495.0000054
Abstract
This paper reviews the effectiveness and costs of strategies to improve roadbed stability in permafrost regions, based on a synthesis of literature findings. Roadbeds in permafrost regions experience instability when the embankment loading and its heat absorption properties degrade the permafrost foundation. A variety of engineering strategies are used to mitigate this effect. The review summarizes the rationale, effectiveness, and costs of four types of strategies, namely those that control roadbed thawing, cool the roadbed, insulate the roadbed, and reduce roadbed fill weight. The literature reveals that strategies to control roadbed thawing, insulate the roadbed, or reduce roadbed fill weight do not reverse the long-term degradation of permafrost foundations. Strategies that cool the roadbed by implementing air convection embankments, ventilation ducts, thermosiphons, heat drains, or combinations of these are effective in reducing embankment temperatures and stabilizing the roadbed. Costs vary by geographic and climatic conditions and the proximity of materials to the construction site. Reported data suggest that conducting normal maintenance is less expensive than implementing roadbed cooling strategies, but maintaining serviceability may not be feasible.Keywords
This publication has 34 references indexed in Scilit:
- Using perforated ventilation ducts to enhance the cooling effect of crushed-rock interlayer on embankments in permafrost regionsCold Regions Science and Technology, 2010
- Case Study of Degrading Permafrost beneath a Road EmbankmentJournal of Cold Regions Engineering, 2009
- Analysis of the thermal stability of an embankment under different pavement types in high temperature permafrost regionsCold Regions Science and Technology, 2008
- Assessment of the effectiveness of two heat removal techniques for permafrost protectionCold Regions Science and Technology, 2008
- Application of the roadbed cooling approach in Qinghai–Tibet railway engineeringCold Regions Science and Technology, 2007
- Application investigation of awning to roadway engineering on the Qinghai-Tibet PlateauCold Regions Science and Technology, 2006
- Yin–Yang Slope problem along Qinghai–Tibetan Lines and its radiation mechanismCold Regions Science and Technology, 2006
- A roadbed cooling approach for the construction of Qinghai–Tibet RailwayCold Regions Science and Technology, 2005
- Permafrost Studies in the Qinghai–Tibet Plateau for Road ConstructionJournal of Cold Regions Engineering, 2005
- Principle of thermal insulation for permafrost protectionCold Regions Science and Technology, 2004