Explore Shallow Ground Temperature of Railway Embankment in Permafrost Regions on Qinghai-Tibet Plateau

Abstract:

Based on observed temperature values in Beiluhe on Qinghai–Tibet Plateau, this paper sets up a regression equation using statistics methods between the temperature at shallow ground depth (0.5 m)and the direct solar radiation on embankment horizontal surface. There is a good linear relation between the temperature and the solar radiation after the phase difference is removed. Correlation coefficient R2 is 0. 9321, and the regression equation is: T = aQ – b where, T—temperature (°C) on horizontal surface of shallow ground (0.5m); Q—solar radiation after the phase difference is removed (W.m-2); a,b—constants, is 0.5552and 16.549, respectively. The equation is validated and allows the temperature on horizontal surface of railway embankments. Whether it applies to other places needs further study. And based on this conclusion, combining with the law of documents and materials, and considering local factors, such as vegetative cover, snow, lithology, soil moisture and so on, we further prove there is obvious linear relation between the temperature and the direct solar radiation on horizontal surface.

• Periodical: Advanced Materials Research (Volumes 168-170)
• Pages: 1463-1469
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.168-170.1463
• Online since: December 2010
• Authors: Ya Ling Chou, Ya Xiong Liang, Yu Wen Li, Yan Peng Zhu
• Keywords: Direct Solar Radiation, Embankment in Permafrost Region, Shallow Ground Temperature, Soil Mechanic, Special Ground Material

References

[1] Wu Ziwang, Cheng Guodong, Zhu Linnan et al, 1988. Roadbed Engineering in permafrost Region. Lanzhou: Publishing House of Lanzhou University, 43-48. （In Chinese）.

[2] Li Zhulong, Zhang Jinzhao, Wujin Ming, 2000. Study on thermal calculation of frozen soil embankment. Highway, (2), 9-12. （In Chinese）.

[3] Goering, D. J, Kumar, P, 1996. Winter-time convection in oper-graded embankments. Cold Regions Science and Technology, 24, 57-74.

DOI: 10.1016/0165-232x(95)00011-y

[4] Zhu Linnan, 1988. Study of the adherent layer on different types of ground in Permafrost Regions on the Qinghai-Xizang Plateau. Journal of Glaciology and Geocrylogy, 10(1), 8-14. (In Chinese).

[5] Hu Zeyong, Qian Zeyu, Cheng Guodong et al, 2002. Influence of solar radiation on embankment surface thermal regime of the Qinghai-Xizang railway. Journal of Glaciology and Geocrylogy, 24(2), 121-128. （In Chinese）.

[6] Wang Keli, Cheng Guodong, 2002. Thermodynamic model of the ground and roadbed surface along the Qinghai-Tibetan railway (Ⅰ): Physical process and experimental scheme. Journal of Glaciology and Geocrylogy, 24(6), 759-764. （In Chinese）.

[7] Chou Yaling, Sheng Yu, Wei Zhenming, et al., 2008. Calculation of temperature differences between the sunny slopes and the shady slopes along railways in permafrost regions on Qinghai-Tibet Plateau. Cold Regions Science and Technology, 53(3), 346-354.

DOI: 10.1016/j.coldregions.2008.04.004

[8] Sun Zengkui, Wang Lianjun, Bai Mingzhou, et al, 2004. Finite element analysis on temperature field of Qing-Tibet Railway embankment on permafrost. Chinese Journal of Rock Mechanics and Engineering, 23(20), 3454-3459. （In Chinese）.

[9] Sheng Yu, Li Jing, Wu Jichun et al., 2010. Distribution patterns of permafrost in the upper area of Shule River with the application of GIS technique. Journal of China University of Mining & Technology, 39(1), 32-39. （In Chinese）.

[10] Juli, N. A, Chuec,A. J, 2007. Permafrost distribution from BTS measurements (Sierra de Telera, Central Pyrenees, Spain): assessing the importance of solar radiation in a mid-elevation shaded mountainous area. Permafrost and Periglacial Processes, 18(2), 137-149.

DOI: 10.1002/ppp.576

[11] Lewkowicz, A. G, Ednie, M, 2004. Probability mapping of mountain permafrost using the BTS method, Wolf Creek, Yukon Territory, Canada. Permafrost and Periglacial Processes, 15(1), 67-80.

DOI: 10.1002/ppp.480

[12] Gruber, S, Hoelzle, M, 2001. Statistical modelling ofmountain permafrost distribution: Local calibration and incorporation of remotely sensed data. Permafrost and Periglacial Processes, 12(1), 69-77.

DOI: 10.1002/ppp.374

[13] Kydeliaftref, B. A., 1992. Predicting principle on research of engineering geology. Lanzhou: Lanzhou University Press, 1992, 11-19.