【摘要】 应用数值方法 ,对多年冻土场地上通风管基础通风面积进行了二维数值分析 ,并给出了设计计算方法。针对拟建的漠河通衡运输公司客运站工程进行了设计。漠河多年冻土区平均气温为 0 1℃。设计通风管基础离天然地面 4 5 0mm ,管径为 30 0mm的通风管 ,通风管间的距离为 1m。数值计算表明 ,通风管基础能使其下面的融化盘减小 ,最大融化深度减小 ,0℃等温线上移。该现象说明通风管基础具有很好的冻土制冷和确保多年冻土上限的位置不下移的作用 ,从而达到保证冻土地基稳定的目的更多还原

【Abstract】 In this paper,two-dimensional finite element analysis is conducted to simulate the thermal state of the ducts of ventilative foundation on permafrost soil,by which a design method is recommended.In this way ,a ventilative foundation of a building that will be built in Mohe is designed,where the mean annual temperature is 0.1℃.The piles,300mm in diameter,are fixed 450mm above the ground.The distance between the adjacent pipes is 1.0m.The result indicates that ventilative foundations are able to reduce its thawing zone,reduce the maximum thawing depth and uplift the constant temperature line.This indicates that ventilative foundation can cool the permafrost beneath,prevent the upper limit of permafrost soil from moving downward.The permafrost soil can then be stabilized.更多还原