青藏高等级公路斜插式热棒路基降温效果数值分析 |
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引用本文: | 张坤,;房建宏,;毛云程,;穆彦虎. 青藏高等级公路斜插式热棒路基降温效果数值分析[J]. 地震学刊, 2014, 0(4): 401-406 |
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作者姓名: | 张坤, 房建宏, 毛云程, 穆彦虎 |
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作者单位: | [1]甘肃省交通科学研究院有限公司,兰州730050; [2]青海省交通科学研究所,西宁810008; [3]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,兰州730000 |
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基金项目: | 冻土工程国家重点实验室开放基金项目(SKLFSE201107); 国家重点基础研究发展计划(973)项目(2012CB026102); 国家自然科学基金项目(41271080)资助 |
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摘 要: | 以青海共和至玉树高等级公路中的实际设计断面为模型,通过数值模拟研究斜插式热棒路基和斜插式热棒-XPS复合路基的降温效果。结果表明,在气候变暖背景下,两种路基在一定时期内可以降低其下部多年冻土温度,提高路基下冻土上限,但随着气温逐渐升高,两种路基反压护道下多年冻土中有融化核出现,并且斜插式热棒路基下多年冻土中及斜插式热棒-XPS复合路基填土中有融化核出现;增加XPS保温板,在一定时期内可以提升斜插式热棒路基的降温能力,使斜插式热棒-XPS复合路基降温效果优于斜插式热棒路基,且前者冻土上限始终高于后者,但对于增强其长期降温的效果并不显著。
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关 键 词: | 斜插式热棒路基 斜插式热棒-XPS复合路基 多年冻土:降温效果 |
Numerical Analysis on Cooling Effect of Inclined Thermosyphon Embankment of Qinghai-Tibet High-grade Road |
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Affiliation: | ZHANG Kun , FANG Jian-hong , MAO Yun-cheng , MU Yan-hu (1. Gansu Communications Research Institute, Lanzhou 730050, China; 2. Qinghai Communications Research Institute, Xining 810008, China; 3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China) |
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Abstract: | Abstract :Based on the model of the designed sections of Gonghe-Yushu high-grade road, the cooling effect of the inclined thermosyphon embankment and the inclined thermosyphon-XPS in- sulated board embankment were analyzed by numerical simulation. The results show that both of the two embankments could cool down the permafrost temperature and raise the permafrost ta- bles in the specified period under the background of global warming. However, with the air tem- perature rising, the melt bubbles would appear in the permafrost under the loading berms of the two embankments, the inclined thermosyphon embankment, and in the filling of the inclined thermosyphon-XPS insulated board embankment. Increase of the XPS insulated board could en- hance the cooling ability of the inclined thermosyphon embankment in a given period, and make the cooling effect of the inclined thermosyphon-XPS insulated board embankment better than that of the inclined thermosyphon embankment. The permafrost table of the former is higher than that of the latter, but the long-term cooling effect of the inclined thermosyphon embankment is not remarkable for the XPS insulated board. |
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Keywords: | inclined thermosyphon embankment inclined thermosyphon-XPS composite embank- ment permafrost cooling effect |
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