Observation Study on the Stability of Frozen Soil Roadbed Equipped with Thermosyphon in Chaidaer-Muli Railway

Abstract:

The Chaidaer-muli railway winds along the Datong River in the central region of the Qilian Mountains. The widely distributed permafrost along the railway is characterized by swampy and warm, which leads to the poor Engineering geologic conditions of the transportation line from the point of frozen soil. That the extending direction of the railway is nearly southeast-northwest causes its roadbed experience the yin-yang slope problems. To improve the stability of frozen soil roadbed, proactive cooling measures were adopted in a large proportion of the roadbed with permafrost, in which about 20km railway was equipped with thermosyphon. At the same time, different design parameter was adopted in the sunny and shady side slopes in the thermosyphon parts. Observation data in the experimental section with warm permafrost shows, under the condition of current thermosyphon techniques and design parameters, thermosyphon measures can effectively cool the frozen soil roadbed, substantially reduce the settlement and successfully solve the yin-yang slope problem of the railway subgrade in swampy warm permafrost.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 4003-4007
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.4003
• Online since: May 2011
• Authors: Chen Ji, Zhang Bo, Rui Fang Song, Xian Fu Dong, Lu Xin Zhang
• Keywords: Chaimu Railway, Frozen Soil Roadbed, Swampy Warm Permafrost, Thermosyphon, Yin-Yang Slope

References

[1] Hayley D.W., Roggensack W.D., et al. Conner B., Goering D.J: Stabilization of sinkholes on the Hudson Bay Railway. Proceedings of the 4th International Conference on permafrost. America: National Academy Press (1983), p.468.

[2] Esch D.C: Roadway Embankments on Warm Permafrost problems and remedial treatments. Proceedings of the 5th Inter. Conference on Permafrost (1988), p.1223.

[3] Ma Wei, Cheng Guodong, Wu Qing-bai: Study on the methods of active cooling foundation in permafrost area. Journal of Glaciology and Geocryology, Vol.24(2002), p.579.

[4] Ran Li, Xue Xinggong, Bao Liming: Application and technical characteristics of thermal pipe subgrade in Qinghai-Tibet Railway design. Proceedings of the 6th International Symposium on permafrost engineering (2004), p.151.

[5] Pan Weidong, Zhao Suchang, Xu Weize etal: Application Study of Heap Pipe Adopted to Stabilize the Frozen Soil Roadbed. Journal of Glaciology and Geocryology, Vol25(2003), p.433.