| 青藏高原北麓河地区原状多年冻土导热系数的试验研究 |
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| 引用本文： | 温智,盛煜,马巍,邓友生,吴基春.青藏高原北麓河地区原状多年冻土导热系数的试验研究[J].冰川冻土,2005,27(2):182-187. |
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| 作者姓名： | 温智 盛煜 马巍 邓友生 吴基春 |
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| 作者单位： | 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, 甘肃, 兰州, 730000 |
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| 基金项目： | 中国科学院知识创新工程项目
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国家重点基础研究发展计划(973计划)
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国家自然科学基金 |
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| 摘 要： | 取自青藏高原北麓河试验段的原状冻土, 利用 QL-30 热物性分析仪测定原状冻土的导热系数. 结果表明: 原状冻土和重塑土的导热系数变化规律存在着较大差别. 对于浅部冻土层, 气体体积含量和含冰量是影响原状冻土导热系数的控制因素; 而对于地下冰层, 冰是控制其导热系数的最重要因素, 气体体积含量的大小也对其导热系数有影响. 对于深部强 全风化泥岩, 气体体积含量控制着它的导热系数的大小.
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| 关 键 词： | 多年冻土 北麓河 青藏高原 导热系数 |
| 文章编号： | 1000-0240(2005)02-0182-06 |
| 收稿时间： | 2004-08-10 |
| 修稿时间： | 2004年8月10日 |
Experimental Studies of Thermal Conductivity of Undisturbed Permafrost at Beiluhe Testing Site on the Tibetan Plateau |
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| WEN Zhi,SHENG Yu,MA Wei,DENG You-sheng,WU Ji-chun.Experimental Studies of Thermal Conductivity of Undisturbed Permafrost at Beiluhe Testing Site on the Tibetan Plateau[J].Journal of Glaciology and Geocryology,2005,27(2):182-187. |
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| Authors: | WEN Zhi SHENG Yu MA Wei DENG You-sheng WU Ji-chun |
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| Institution: | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu, 730000, China |
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| Abstract: | Thermal conductivity is an important parameter for estimating thermal regime of permafrost in engineering design. Using QL-30 thermophysical instrument made in Anter Corporation in State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, thermal conductivity of undisturbed permafrost taken from Beiluhe site were studied. Experimental studies show that there are distinct difference in thermal conductivity between undisturbed permafrost and frozen soil. Ice content by volume controls the thermal conductivity of shallow permafrost. For the shallow permafrost with same soil texture, same structure and consolidation condition, it is found that its thermal conductivity has negative correlativity with gas content by volume and positive correlativity with volume density, respectively. On the other hand, gas content by volume is a dominant factor that affects the thermal conductivity of deep permafrost and ground ice. Besides, ground ice in the Tibetan Plateau has the thermal conductivity equivalent to that of pure ice, and gas content by volume affects its thermal conductivity. The studies of thermal conductivity of undisturbed permafrost on the Tibetan Plateau will be helpful to the thermal calculation in the permafrost regions of the plateau. |
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| Keywords: | permafrost Beiluhe Tibetan Plateau thermal conductivity |
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