Abstract：Research purposes ： The proposed Wenchuan - Chuanzhusi expressway, which is the part of proposed Wenchuan -Jiuzhaigou expressway, is located in the area of Wenchuan "5. 12" earthquake affected. The groove and the two sides of proposed expressway have rich debris flow matters because of its complicated influence factor of topography, lithology and geological structure, which easily triggers debris flow disaster under the storm condition. Based on the measures of data collection, remote sensing interpretation and field geological surveys, this paper found out the distribution and damage characteristic of debris flow of the expressway area, and guided the engineering geological alignment of the expressway.
Research conclusions :(1) Within the area of expressway, the debris flow has the characteristics of breaking out with numbers, large area, high frequency and high truculency. (2) Debris flow distributed along the proposed expressway has the damage modes of buried hazards, destroyed hazards and blocking river hazards. (3 ) In the area of valley, the engineering geological alignment of the proposed expressway should be done before ascertaining the traces of debris flow activity and its scale，and then determined the position and elevation of the expressway ； The alignment of the proposed expressway should avoid the debris flow which is in the period of formation and development，or is afflicted by serious silting ； In the valley area the alignment of the expressway should be prohibited passing through the position of debris flow deposit，but allowed to cross the flowing area of debris flow by the form of high - span bridge. (4) The research conclusions can be widely applied in the geological alignment for expressway，railway engineering in Wenchuan area.
宋章，韩世华，,杜宇本，李铁洪. 汶九高速A5标泥石流灾害特征及地质选线研究[J]. 铁道工程学报, 2015, 32(10): 12-16.
SONG Zhang1，HAN Shi - hua2, DU Yu - ben1，LI Tie - hong2. Research on the Characteristic of Debris Flow Disaster and Geological Alignment for the 5 th Section of Wunchuan - Jiuzhaigou Expressway. Journal of Railway Engineering Society, 2015, 32(10): 12-16.
2015, Vol. 32 
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