| 人类工程活动下多年冻土热融蚀敏感性评价模型 |
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| 引用本文： | 吴青柏,朱元林,刘永智. 人类工程活动下多年冻土热融蚀敏感性评价模型[J]. 岩土工程学报, 2001, 23(6): 731-735 |
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| 作者姓名： | 吴青柏 朱元林 刘永智 |
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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；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南京大学地球科学系；江苏南京210093；甘肃兰州730000； |
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| 基金项目： | 中国科学院寒区旱区环境与工程研究所创新项目(CRCX210047,CRCX210077)资助;南京大学博士后基金资助 |
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| 摘 要： | 多年冻土热融蚀敏感性是冻土环境变化评价的重要指标之一 ,在评价工程活动对多年冻土环境影响的敏感性变化起极为重要的作用。本文提出多年冻土热融蚀敏感性定量评价模型 ,通过青藏公路沿线地温监测资料用定量评价模型分析工程活动对多年冻土环境影响的敏感性变化。结果表明 :冻土热融蚀敏感性与多年冻土温度及年平均地温呈指数关系 ,与季节融化深度呈对数关系 ;冻土热融蚀敏感性变化也与冻融过程的变化相一致。
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| 关 键 词： | 工程活动 冻土热融蚀敏感性 评价模型 |
| 文章编号： | 1000-4548(2001)06-0731-05 |
| 修稿时间： | 2001-03-21 |
Assessment model of thermal thawing sensibility of permafrost under engineering activity |
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| WU Qingbai,ZHU Yuanlin,LIU Yongzhi. Assessment model of thermal thawing sensibility of permafrost under engineering activity[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(6): 731-735 |
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| Authors: | WU Qingbai ZHU Yuanlin LIU Yongzhi |
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| Affiliation: | 1.State Key Laboratory of Frozen Soil Engineering Cold and Arid Regio ns Environmental and Engineering Research Institute CAS Lanzhou 730000 China 2. AECI Department of Earth Science Nanjing |
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| Abstract: | Thermal thawing sensibility play an important role in evaluating the sensible in fluence of engineering activity on frozen soil environment. Evaluating model of thermal thawing sensibility (EMTTS) is proposed, and the sensible influence of e ngineering disturbance on frozen soil environment is analyzed by using EMTTS acc ording to monitored data of ground temperature along Qinghai-Xizang Highway. The results of analysis show that thermal thawing sensibility of permafrost c hanges exponentially with permafrost temperature and annual mean ground temperature and logari thmically with seasonally freezing-thawing depth. The change of thermal thawing sensibility corresponds to the changes of seasonally freezing and thawin g process. |
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| Keywords: | evaluation model permafrost thermal thawing sensibil ity engineering activity |
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