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青藏公路熱棒(bang)制冷(ling)工程(Heat Pipe Subgrade in Permafrost Regions)
來源:西安中交公路岩土工程有(you)限責(ze)任公司   發(fa)布時間(jian):2013/7/1   瀏(liu)覽次數︰


  青藏公路穿越數百公里(li)的多年凍土地區。周而(er)復始的凍融循環所導致基底(di)的不均勻變形及其帶來的路面、橋涵(han)等構造物的破壞(huai),多年來一直是青藏公路建設(she)和管(guan)養過程中最大的技術難(nan)題。

  公司技術人(ren)員在進行路基科(ke)研試驗和施工中,除采用通風路基、碎石邊坡、遮陽板等先(xian)進技術手段外,還在高溫、高含冰量路fan)尾捎昧宋wu)動(dong)力熱棒(bang)制冷(ling)技術,即(ji)利用封閉(bi)管(guan)體(ti)中液(ye)態與(yu)氣態轉換散熱原(yuan)理(li)將(jiang)凍土地層中的熱量傳輸至大氣中,降低多年凍土溫度,防止(zhi)多年凍土上限下移,有(you)效改善了多年凍土路fan)蔚鞀撂ti)的力學特征。青藏公路楚瑪爾河高平原(yuan)K2937+100~K2939+160、K2947+500~K2951+100兩段路基沉(chen)降變形和縱向裂縫十分嚴重,采用熱棒(bang)制冷(ling)技術處治(zhi)後已使(shi)用三年,效果良好。大規模采用熱棒(bang)制冷(ling)技術解決多年凍土地區路基穩(wen)定(ding)問題,在我國(guo)尚屬首(shou)例,並為青藏公路建設(she)所采用。

  Qinghai-tibet highway runs through the permafrost area of several hundred kilometers. The ununiformity deformation of subgrade bottom caused by repeated frost-and-thaw cycle and the breakage to the structures such as road surface, bridge and culvert have been  all along the most difficult technology problem for many years.
In scientific research test and construction, in addition to using advanced technology means such as ventilation subgrade, macadam side slope, sunshading board, the professionals of the company adopt
the no-power hot stick cooling technology in the road section with high temperature and high ice content, namely: transforming the heat in frost soil layer to the atmosphere in light of the cooling theory of liquid-and-gas conversion in closed pipe so as to decrease permafrost temperature and to prevent the upper limit of permafrost from moving downward, this technology effectively improves the mechanics feature of subgrade soil in permafrost road section. The subgrade of K2937+100~K2939+160 and K2947+500~K2951+100 sections of Chuermahe high plain in Qing Zang highway had serious settlement deformation and longitudinal crack, after treatment by hot stick cooling technology three years ago, it is still in good condition. This is the first example of using hot stick cooling technology on a large scale to solve the subgrade stability problem in permafrost area, and it was adopted in construction of Qing Zang highway.

版權(quan)所有(you)︰西安中交公路岩土工程有(you)限責(ze)任公司   網站(zhan)地圖     公司地址(zhi)︰西安市高新區灃惠南路20號華晶商務廣(guang)場A座10層 郵(you)政編(bian)碼︰710075 備案號︰陝ICP備05009718號

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