关键词: 新亚欧大陆桥新疆段, 环境地质灾害, 时空分布, 活动强度, 灾害趋势

Abstract: Xinjiang section of New Eurasian Continental Bridge is an important lifeline project in west China. It bestrides four deferent physiographical units. Along the Xinjiang section of New Eurasian Continental Bridge, various disasters, such as flood, strong wind, sand disaster, roadbed disasters, often occur. Owing to these kinds of natural conditions, great events of flood disasters are often formed in the process of rain intensity of 25 mm/d or more than 30 mm/d. The disasters occur mostly in July. The critical wind speed turning over the train is in a range from³5 m/s to 67 m/s, which happen in draught place of mountain opening and trunk valley. The relationship between content and height of sand flow is in the form of index function. When the angle of wind direction and railway is more than forty-five degrees, the thickness of accumulative sand along the railway increases rapidly. Though the vulnerability analysis on each section, it indicates that the intensity of hazards along the section is：Urumqi＞Shihezi＞Kuitun＞Liuyuan＞Shanshan＞Hami, and the flood frequency and intensity will increase gradually in the future. The range and intensity of sand hazard is increasing gradually.

Key words: New Eurasian Continental Bridge, environmental geological Hazard, temporal and spatial distribution, active intensity, hazard trend