Technical approaches on permafrost thermal stability for Qinghai–Tibet Railway

作者：Qingbai Wu, Guodong Cheng, Wei Ma, Fujun Niu, Zhizhong Sun · 发表于：Geomechanics and Geoengineering · 年份：2006 · DOI：10.1080/17486020600777861 · 被引用次数：45 · 研究领域：Climate change and permafrost、Smart Materials for Construction、Cryospheric studies and observations

Widespread warm permafrost with a high ice content is a key problem for the roadbed stability of the Qinghai–Tibet Railway. A new approach is proposed to alleviate the effect of global warming and engineering construction on permafrost by cooling the roadbed and positively protecting the permafrost. Measures for cooling the roadbed by adjusting solar radiation, conduction, and convection are studied and applied to prevent ground ice from thawing and to ensure roadbed stability in permafrost regions. The results of monitoring permafrost embankments at Beiluhe and along the Qinghai–Tibet Railway show that the measures adopted for cooling the roadbed are very effective in raising permafrost table and reducing the soil temperature.