公路风吹雪防治工程设计量级计算初探  

Calculation of magnitude of snowdrift on highway in its prevention engineering design

作　　者：马磊 刘健 胡智轩 李在蓝 何勇 吴鹏 MA Lei;LIU Jian;HU Zhi-xuan;LI Zai-lan;HE Yong;WU Peng(Key Laboratory of Highway Engineering Technology and Transportation Industry in Arid Desert Area,Xinjiang Academy of Transportation Sciences,Urumqi 830000,Xinjiang,China)

机构地区：[1]干旱荒漠区公路工程技术交通运输行业重点实验室新疆交通科学研究院

出　　处：《干旱区地理》2019年第5期998-1002,共5页Arid Land Geography

基　　金：交通运输部应用基础研究项目(2014319797050)

摘　　要：利用极值Ⅰ型分布和WeiBull分布研究了新疆阿勒泰闹海风区冬季风的极值分布、平均风速概率分布、引发风吹雪的风时数。利用极值、平均概率分布面域、风吹雪时数来量化风吹雪的强度,并将计算得出的风吹雪防治工程设计量级,纳入风吹雪影响区域内的公路设计中。结果表明:通过WeiBull分布的平均风速和风吹雪有效时间分布来计算防雪工程量级是一种公路风吹雪防治工程的计算方法,防雪工程的设计并没有明确的以再现期为指标的设计量级,仅存在防治灾害的量级。The extremum distribution of winter wind,the mean wind speed probability distribution and the wind hours of snowdrift at Naohai wind zone of Jimunai County,Xinjiang,China are studied using extremeⅠtype distribution and WeiBull distribution.The magnitude of wind-blown snow is quantified using the extreme value,the average probability distribution area and the wind-blown snow hour.The computed wind-blown snow magnitude is included for the road engineering design in the areas affected by wind and snow.The conclusion shows that the calculation of the snow protection engineering grade based on the mean wind speed of WeiBull distribution and the effective time distribution of wind-blown snow is a feasible method for the snowdrift prevention and control engineering on the highway.The design of the snow prevention projects does not have a clear design level with the reoccurrence period as an indicator,but only exists the magnitude of the disaster prevention and control.The extremeⅠtype distribution can be used as load calculation of snow fence,but it could not fit in the magnitude calculation of wind-blown snow.Using WeiBull distribution to calculate the effective blowing time and the average distribution of wind can effectively express the intensity of the wind-blown snow.Through this pattern,we can cipher out that the effective wind and snow blowing time is 88.74 days and the wind and snow magnitude is 452 m^3·m^-1 at the zone.

关 键 词：公路 风吹雪 防雪工程 设计频率 吉木乃 

分 类 号：U418[交通运输工程—道路与铁道工程]