Design Parameters Analysis of Insulated Embankments in Qinghai-Tibet Plateau Permafrost Region

Wang, Hai-nian; Dou, Ming-jian

doi:doi:10.1061/(ASCE)0887-381X(2007)21:1(1)

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Journal of Cold Regions Engineering / Volume 21 / Issue 1 / TECHNICAL PAPERS

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Design Parameters Analysis of Insulated Embankments in Qinghai-Tibet Plateau Permafrost Region

J. Cold Reg. Eng. 21, 1 (2007); http://dx.doi.org/10.1061/(ASCE)0887-381X(2007)21:1(1) (18 pages)

Hai-nian Wang¹ and Ming-jian Dou²

¹Ph.D. Student, Mailbox: 715, Highway School, Chang’an Univ., South Erhuan Rd. Middle Section, Xi’an, China 710064. E-mail: wanghainian@yahoo.com.cn
²Professor, Highway School, Chang’an Univ., Xi’an, China 710064. E-mail: Jiandm_01@sina.com

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(Submitted 4 January 2005; accepted 13 June 2006)

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Abstract

References (33)

Citing Articles (1)

Article Objects (13)

Based on the problems of application of embankments with insulation in permafrost regions, a finite-element method (FEM) was adopted to analyze the influence on permafrost protection effects of the parameters such as insulation materials and thickness, embedded depth, annual mean permafrost temperature, and construction season timing. The FEM calculated results have shown that, in the long-term view of Qinghai-Tibet plateau with rising temperature, all embankments with insulation can protect the permafrost underneath and delay thawing of the permafrost table. The protection effects are related to insulation materials and thickness, embedded depth, construction season timing, and annual mean permafrost temperature. For the embankment design, the influence of all parameters should be taken into account comprehensively, and the most appropriate parameters group should be adopted to protect the permafrost most effectively.

Acknowledgments

The research was supported by funds from the Natural Science Found Committee (NSFC) of China (Grant No. 50178010) and the Key Western Transportation Technology Program of National Communication Ministry (No. 200231881203).

Article Outline

Introduction
FEM Model
1. Governing Equations
2. Structure and Size of FEM Models
3. Thermal Properties of Soil and Insulation
4. Boundary Conditions and Initial Conditions
  1. Boundary Conditions
  2. Initial Conditions
5. Selection of the Grid Size and Time Step
6. Calculation Cases
Results and Discussion
1. Influence of Insulation Materials
2. Influence of Insulation Thickness
3. Influence of AMGT on Permafrost Protecting Effect
4. Influence of Construction Season Timing on Permafrost Protecting Effect
5. Influence of Insulation Embedded Depth on Permafrost Protecting Effect
Conclusions

KEYWORDS

ASCE SUBJECT HEADINGS

Highway engineering, Parameters, Embankments, Permafrost

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ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1061/(ASCE)0887-381X(2007)21:1(1)

PUBLICATION DATA

ISSN

0887-381X (print)

1943-5495 (online)

Publisher

ASCE

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