Sciences in Cold and Arid Regions ›› 2016, Vol. 8 ›› Issue (2): 95-102.doi: 10.3724/SP.J.1226.2016.00095

• ARTICLES •    

Snow disaster characteristics in Palongzangbu River Basin and mitigation countermeasures for road engineering

ShuSu Duan1, LingKan Yao1,2,3, XiaoDan Sun3, Qiang Cai1   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China;
    2. Road and Railway Engineering Research Institute, Sichuan Key Laboratory of Seismic Engineering and Technology, Chengdu, Sichuan 610031, China;
    3. MOE Key Laboratory of High-speed Railway Engineering, Chengdu, Sichuan 610031, China
  • Received:2015-07-12 Revised:2015-11-11 Published:2018-11-23
  • Contact: LingKan Yao
  • Supported by:
    This study is financially supported by the general project of Natural Science Foundation of China(No.41571004);Scientific and technological research and development plan of China Railway Corporation(No.2015G002-N);General project of Natural Science Foundation of China(No.41172321).

Abstract: The Palongzangbu River Basin contains the highest number of maritime province glaciers in China.There are 130 glacial lakes,64 snow avalanche sites and 28 glacial debris flow gullies distributed within the basin.Snow disasters play a controlling role in the Sichuan-Tibet Highway construction,due to the terrain's special characteristics of high altitude and large height differential.Segmentation mitigation countermeasures for the Sichuan-Tibet Highway are presented based on snow disaster severity level and damage mode of the road.In the Ranwu to Midui section,snow avalanches are regional disasters, so the line should be placed in sunny slopes.In the Midui Gully to Yupu section,the line should be placed in shady slopes and at higher elevations to reduce the risk of glacial lake outburst.In the Yupu to Guxiang section,all three snow disasters are minimal.In the Guxiang to Tongmai section,glacier debris flows are the major threat,thus the road should be placed in shady slopes.

Key words: Palongzangbu River Basin, glacial lake outburst, snow avalanche, glacial debris flow, line engineering

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