透壁式通風(fēng)管-塊石復(fù)合氣冷路基室內(nèi)模型試驗研究
發(fā)布時間:2018-11-27 12:17
【摘要】:為了研究透壁式通風(fēng)管-塊石復(fù)合氣冷路基的降溫效果,針對年均氣溫約-3.5℃,平均風(fēng)速2.5 m·s-1,主導(dǎo)風(fēng)向為西北方向的高原環(huán)境條件開展室內(nèi)模型試驗,分析了單一塊石氣冷路基和透壁式通風(fēng)管-塊石復(fù)合氣冷路基的孔隙空氣對流速度、特征點地溫變化過程以及模型整體溫度場變化過程.結(jié)果表明:在透壁式通風(fēng)管的疏導(dǎo)作用下,透壁式通風(fēng)管與塊石層的復(fù)合結(jié)構(gòu)能夠起到強(qiáng)化路基體對流的效果,復(fù)合路基塊石孔隙中的空氣流速比單一塊石路基提高約20%,由此導(dǎo)致復(fù)合路基模型底部的降溫幅度是單一塊石路基模型的2.2倍.模型整體溫度場表明,復(fù)合路基能夠起到儲存冷量、降低下伏多年凍土地溫的作用.
[Abstract]:In order to study the cooling effect of air-cooled roadbed with permeable ventilation pipe and block stone, an indoor model test was carried out on the plateau environment with average annual temperature of -3.5 鈩,
本文編號:2360729
[Abstract]:In order to study the cooling effect of air-cooled roadbed with permeable ventilation pipe and block stone, an indoor model test was carried out on the plateau environment with average annual temperature of -3.5 鈩,
本文編號:2360729
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