中国天山艾肯达坂透风式下导风防雪工程  

APPLICATION OF BLOWER FENCES WITH A PERMEABILITY NEW TECHNOLOG6Y ON AIKEN PASS IN TIANSHAN MOUNTAIN OF CHINA

作　　者：王中隆[1] 

机构地区：[1]中国科学院兰州冰冻土冻土研究所

出　　处：《山地研究》1994年第4期193-200,共8页

基　　金：新疆维吾尔自治区交通厅公路管理局资助

摘　　要：据艾肯达坂风雪流形成条件，提出了贴地气层分离是公路吹雪堆积的机理，通过对密闭式下导风能量转换和流场结构的剖析，创造了透风式下导风防雪工程。其实施后，改变了公路因冬半年严重雪阻而不能通车的状况，经济效益和社会效益俱佳；Tianshan Mountahs inner China extend in WE,the altitude is usually over 4 000m,the coldand warm seasons can be divided clearly,Aiken Pass(at the aititude 2 840 3050m)is situatedin west part of Mt. Tianshan and the intersected site of windward slope and wind gaps. Here isthe most precipitational region on Mt. Tianshan, the annual precipitation is 1 000mm, The winterhalf an year(during october in year to April in next year) is the main snowfall period,the ave-rage temperature is below 0℃, the lowermost temperature reaches-37℃;the average snowfallis 350mm ,the maximum one reaches 394mm, the maximum natural snow deposit>145cm;theveIocity of wind >5. 0m/s reaches 1 600h, the occurring frequency of snow drift is 50%,andthe total snow transportation is 100-500m￣3/m。 The section along Aiken Pass(23km long)in National Highway from Yining to Ruoqiang isthe key section which connects the sOuth and north Xinjiang each other. Before 1981 ,this part isthe serious snow blockage section in this region , the maximum snow deposit reached 8m, duringthe period of winter half an ycar,all automobiles should take a devious round for 807km. More than 7 0% of hlghway snow blockage is caused by continuous snowfail, The snowdeposit type belongs to “dty-cold type ” which is fit for starting and movement of snow grain,thefavourable roabded Sectional type for snow drift deposition is mainly in a leeward one-sided cut,windward one-sided cut and typical cut etc. All these factors become the formation condition ofsnow drift and snow block age disasters in Aike n Pass,The vortex velocity reduction zone causedby separation of boundar y layer on road surface is the main generation of road snow blockage。The blower fence and blower fence with a permeability are all the snow dirft preventionalworks , but the first one needs much deflector material,it is easy to be destoyed and difficult tomaintenance,the late one can avoid these weaknesses。The observation on two upright blower fence in leeward one-side cut on Aiken Pass(Fig。3-

关 键 词：透风式下导风 防雪工程 风雪流 公路 

分 类 号：U418.56[交通运输工程—道路与铁道工程]