ISEV 2016: Environmental Vibrations and Transportation Geodynamics pp 727-735 | Cite as
Experimental Study on Temperature Characteristics of CRTS I Twin-Block Ballastless Track
Abstract
Ballastless track is a composite structure made of reinforced concrete materials, whose temperature characteristics can be easily influenced by ambient factors (air temperature and solar radiation). Based on an on-site test in Chengdu, temperature of track superstructure, air temperature and solar radiation intensity are obtained for CRTS I twin-block ballastless track. The relationship between ambient factors and temperature of track superstructure was conduct by the method of statistical analysis, the results show that temperature of track slab, and base plate, air temperature and solar radiation intensity all show a periodical change with the day. The average maximum difference between track slab’s temperature and air temperature is within 6 ℃, and the average difference between maximum and minimum temperature of base plate is only 1.34 ℃. The temperature gradient of track slab also shows a periodical change with the day. The maximum positive and negative temperature gradient of track slab are 92.12 and −28.55 ℃/m, and the average maximum of positive and negative temperature gradient are 50.58 and −14.56 ℃/m.
Keywords
Ballastless track Track superstructure Temperature characteristics Air temperature Solar radiation intensityNotes
Acknowledgements
The work described in this paper was supported by the High-Speed Railway Fundamental Research Joint Fund of China (Grant No. U1434208).
References
- 1.HE Hua-wu. Technology of Ballastless track [M]. Beijing: China Railway Press, 2005.Google Scholar
- 2.LIU Xue-yi, Zhao Ping-rui, Yang Rong-shan. Design Theory and Methods of Ballastless Track [M]. Chengdu, Southwest Jiaotong University Press, 2010.Google Scholar
- 3.ZHAO Ping-rui, Liu Xue-yi. Calculating method and parameter analysis of temperature stress of continuous track slab [J]. Railway Engineering, No 11, 2008, pp: 81–85.Google Scholar
- 4.SUNG CHUL Yang. A temperature prediction model in new concrete pavement and a new test method for concrete fracture parameters[D]. American, Texas A & M University, 1996.Google Scholar
- 5.ZHU Bo-fang. Temperature and temperature stress control of mass concrete [M]. Beijing: China Electric Power Press, 1999.Google Scholar
- 6.GONG Zhao-xiong. Temperature control and crack prevention of hydraulic concrete [M]. Beijing: China Electric Power Press, 1999.Google Scholar
- 7.Yavuzturk C, Ksaibati K, Chiasson A D. Assessment of temperature fluctuations in asphalt pavements due to thermal environmental conditions using a two-dimensional, transient finite-difference approach[J]. Journal of Materials in Civil Engineering, 2005, 17(4), pp: 464–475.CrossRefGoogle Scholar