APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA

ZHANG Baolong; FAN Wen

doi:10.12090/j.issn.1006-6616.2018.24.05.072

Volume 24 Issue 5

Oct. 2018

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ZHANG Baolong, FAN Wen, 2018. APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA. Journal of Geomechanics, 24 (5): 706-713. DOI: 10.12090/j.issn.1006-6616.2018.24.05.072

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APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA

doi: 10.12090/j.issn.1006-6616.2018.24.05.072

ZHANG Baolong^{1, 2
,},
FAN Wen¹

1.
College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China
2.
Inner Mongolia Transportation Design and Research Institute, Huhhot 010010, Inner Mongolia, China

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Received: 2018-06-01
Revised: 2018-08-13
Published: 2018-10-01

Abstract

Abstract

Based on the meteorological engineering geological data, observation data and design data along the Bo-Ya expressway, a numerical calculation model of the roadbed temperature field was constructed by means of finite element software, and the influence of XPS insulation board on temperature field under different subgrade filling height was studied emphatically. The results show that, the increase of the subgrade height and the application of XPS insulation board both play a positive role in protecting permafrost. With the same embankment filling height, the temperature of permafrost of the subgrade with XPS insulation board reduces by about 0.19℃ than that of the subgrade with crushed rocks when the road runs to its twentieth years. XPS insulation board makes the upper limit of permafrost obviously raised, and the average uplift of the upper limit of permafrost is about 1.23 m under the same subgrade height. The upper limit of permafrost of subgrade with XPS insulation board is located in the replaced crushed rocks during the specified years of the designing code. However; the application of XPS insulation board aggravates the development of sunny-shady slope effect, the subgrade height with crushed rock should be kept above 3 m, and the subgrade height with XPS insulation board should be kept no more than 2 m.
- road engineering,
- permafrost,
- XPS insulation board,
- numerical simulation,
- temperature field

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APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA

doi: 10.12090/j.issn.1006-6616.2018.24.05.072

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APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA

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