Temperature Adjustment Mechanism of Composite Embankment with Perforated Ventilation Pipe and Blocky Stone

doi:10.1007/s12204-013-1457-3

Abstract

Abstract: Based on the advantages of perforated ventilation characteristic of perforated ventilation pipe embankment and large porosity of blocky stone embankment, composite embankment with ventilation pipe and blocky stone is more efficient to protect the underlying permafrost. The temperature fields and cooling effect of composite embankment with air doors are simulated by examining the effects of holes’ position drilled in the pipe, diameter in pipe and density of holes. It is shown that the underlying permafrost temperature obviously reduces by composite methods, the location of 0?C isotherm raises significantly, especially permafrost temperature under the center and shoulder of embankment reduces more quickly, the composite embankment with holes drilled in the lower side of pipe is the most efficient, the increase of diameter has a slight influence on the 0?C isotherm’s raising, and the density of holes slightly influences the raising of 0?C isotherm.

Key words: composite embankment| cooling effect| numerical simulation| permafrost| perforated ventilation pipe

摘要： Based on the advantages of perforated ventilation characteristic of perforated ventilation pipe embankment and large porosity of blocky stone embankment, composite embankment with ventilation pipe and blocky stone is more efficient to protect the underlying permafrost. The temperature fields and cooling effect of composite embankment with air doors are simulated by examining the effects of holes’ position drilled in the pipe, diameter in pipe and density of holes. It is shown that the underlying permafrost temperature obviously reduces by composite methods, the location of 0?C isotherm raises significantly, especially permafrost temperature under the center and shoulder of embankment reduces more quickly, the composite embankment with holes drilled in the lower side of pipe is the most efficient, the increase of diameter has a slight influence on the 0?C isotherm’s raising, and the density of holes slightly influences the raising of 0?C isotherm.

关键词: composite embankment| cooling effect| numerical simulation| permafrost| perforated ventilation pipe

CLC Number:

TU 445

NIU Fu-jun1,3 (牛富俊), SUN Hong2* (孙红), GE Xiu-run2 (葛修润), ZHANG Jin-zhao3 (章金钊). Temperature Adjustment Mechanism of Composite Embankment with Perforated Ventilation Pipe and Blocky Stone[J]. Journal of shanghai Jiaotong University (Science), 2013, 18(6): 729-732.

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