The temperature features for different ventilated-duct embankments with adjustable shutters in the Qinghai–Tibet railway

• Published in: Cold regions science and technology Vol. 44; no. 2; pp. 99 - 110
• Main Authors: Guoyu, Li, Ning, Li, Xiaojuan, Quan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2006; Elsevier
• Subjects: Adjustable ventilated-duct embankment; Climatic warming; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Engineering geology; Exact sciences and technology; Qinghai–Tibet railway; Temperature features; Thermal stability; Qinghai China; Xizang China; Far East; China; Adjustable ventilated-duct embankment; Temperature features; Qinghai–Tibet railway; Climatic warming; Thermal stability; embankments; climate warming; digital simulation; air; isotherms; Qinghai-Tibet railway; permafrost; Asia; three-dimensional models; temperature; soils; railroads; thermal analysis
• ISSN: 0165-232X; 1872-7441
• DOI: 10.1016/j.coldregions.2005.08.002

Considering the global warming and the temperature difference between the sunny slope and the shading slope of the embankment in the Qinghai–Tibet railway, the cooling effects for different ventilated-duct embankments with adjustable shutters on the permafrost are studied with 3-D numerical simulations. The numerical results indicated that their temperature fields have distinct difference; the permafrost tables under the adjustable ventilated-duct embankments are raised and the thaw bulbs are degenerated gradually; they are able to ensure the thermal stability of the permafrost under the scenario of climatic warming but the ordinary embankment is not.