摘要
Xinjiang Line of New Eurasian Continental Bridge is the important lifeline project inwestern China. Various disasters, such as flood, strong wind, sandstorm, and roadbed disasters,have been seriously affecting the railway transportation. The field investigation and analysis on thedata collected since 1959 show that: serious floods often occurred when the rain intensity reached25 mm/h or 30 mm/d; the critical wind speed for turning over a train is between 35 m/s and 67 m/s,and such cases happened in draught places of mountain opening and trunk valley; the angle be-tween wind direction and railway is closely related to the thickness of accumulative sand along thelines; roadbed disasters taking the form of side-slope sliding, roadbed sinking and silt turning uptook place in spring when the temperature rapidly rose to 10-15℃ from zero and precipitationcame forth or when the thickness of snow cover on shade slope reached above 20 cm in winter;the disasters taking place in the 1990s were far stronger than those of the 1980s and the order ofhazard intensity along the Xinjiang Line is Urumqi＞Shihezi＞Kuitun＞Liuyuan＞Shanhan＞Hami.
Xinjiang Line of New Eurasian Continental Bridge is the important lifeline project in western China. Various disasters, such as flood, strong wind, sandstorm, and roadbed disasters, have been seriously affecting the railway transportation. The field investigation and analysis on the data collected since 1959 show that: serious floods often occurred when the rain intensity reached 25 mm/h or 30 mm/d; the critical wind speed for turning over a train is between 35 m/s and 67 m/s, and such cases happened in draught places of mountain opening and trunk valley; the angle be- tween wind direction and railway is closely related to the thickness of accumulative sand along the lines; roadbed disasters taking the form of side-slope sliding, roadbed sinking and silt turning up took place in spring when the temperature rapidly rose to 10-15(?) from zero and precipitation came forth or when the thickness of snow cover on shade slope reached above 20 cm in winter; the disasters taking place in the 1990s were far stronger than those of the 1980s and the order of hazard intensity along the Xinjiang Line is Urumqi>Shihezi>Kuitun>Liuyuan>Shanhan>Hami.
基金
supported by the National Natural Science Foundation of China.
