Research on EPS application to very wide highway
embankments in permafrost regions |
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Authors: | YaHu Tian JianHong Fang and YuPeng Shen |
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Institution: | 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
2. Qinghai Research Institute of Transportation, Xining, Qinghai 810008, China;Qinghai Research Institute of Transportation, Xining, Qinghai 810008, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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Abstract: | In order to maintain the thermal stability of very wide highway embankments in permafrost regions, the thermal isolation
material EPS is often utilized. To examine the effects of this insulation on the China National Highway (G214),
two-dimensional finite element analysis of temperature fields was conducted for varying widths of highway embankments
with and without EPS insulation. The numerical results show that in permafrost regions the effect of thermal aggregation on
asphalt pavement is more obvious when highway embankments are wider, and, specifically for the G214 highway, the insulation
should be more than 25 cm thick for 24-m-wide embankments. However, considering other factors such as the structural
rationality of the embankments and high engineering costs, it might not be feasible to install EPS insulation in
24-m-wide embankments of the G214 highway when the height of the embankments is less than 3.65 m. |
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Keywords: | permafrost insulation very wide highway embankment |
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