| 多年冻土地区砂砾路面路堤临界高度数值分析 |
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| 引用本文： | 张明义,赖远明,张建明,齐吉琳.多年冻土地区砂砾路面路堤临界高度数值分析[J].冰川冻土,2004,26(Z1):76-82. |
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| 作者姓名： | 张明义 赖远明 张建明 齐吉琳 |
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| 作者单位： | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China |
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| 基金项目： | 国家优秀青年学者奖励计划
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the Foundation of Hundred People Plan of Chinese Academy of Sciences (to Dr Y.M.Lai)
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中国科学院资助项目 |
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| 摘 要： | In permafrost regions of Qinghai-Tibetan Plateau, the critical embankment height must be considered in the process of the construction of highway, especially for the global climatic warming. In this paper, the two-dimensional numerical analysis for the critical embankment height (for gravel road surface and coarse-grained soil) has been performed by using thefinite element method. In the calculation, we think that the service life of the construction is at least 50 years. The mean annual air temperatures applied to the calculation model are -6.5 ℃, -6.0 ℃, -5.5 ℃, -5.0 ℃, -4.5 ℃ and -4.0 ℃, respectively, and the value of temperature rise are taken as 1.10℃ in the coming 50 years. The minimum embankment heights derived from the analysis are 0.85 m, 0.92 m, 1.01 m, 1.18 m, 1.60 m and 2.66 m for the different mean annual air temperatures and the maximum embankment heights are 7.68 m,7.55 m, 7.34 m, 7.00 m, 6.45 m and 5.85m, accordingly. On condition that the service life of embankment is 50 years, the critical value of the mean annual air temperature is -3.5 ℃. Namely, in the areas where the mean annual air temperature is higher than -3.5 ℃, the critical embankment height does not exist.
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| 关 键 词： | critical embankment height gravel road surface mean annual air temperature numerical studies |
Numerical Studies on Critical Height of Embankment for Gravel Road Surface in Permafrost Regions |
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| ZHANG Ming-yi,LAI Yuan-ming,ZHANG Jian-ming,QI Ji-lin.Numerical Studies on Critical Height of Embankment for Gravel Road Surface in Permafrost Regions[J].Journal of Glaciology and Geocryology,2004,26(Z1):76-82. |
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| Authors: | ZHANG Ming-yi LAI Yuan-ming ZHANG Jian-ming QI Ji-lin |
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| Abstract: | In permafrost regions of Qinghai-Tibetan Plateau, the critical embankment height must be considered in the process of the construction of highway, especially for the global climatic warming. In this paper, the two-dimensional numerical analysis for the critical embankment height (for gravel road surface and coarse-grained soil) has been performed by using thefinite element method. In the calculation, we think that the service life of the construction is at least 50 years. The mean annual air temperatures applied to the calculation model are -6.5 ℃, -6.0 ℃, -5.5 ℃, -5.0 ℃, -4.5 ℃ and -4.0 ℃, respectively, and the value of temperature rise are taken as 1.10℃ in the coming 50 years. The minimum embankment heights derived from the analysis are 0.85 m, 0.92 m, 1.01 m, 1.18 m, 1.60 m and 2.66 m for the different mean annual air temperatures and the maximum embankment heights are 7.68 m,7.55 m, 7.34 m, 7.00 m, 6.45 m and 5.85m, accordingly. On condition that the service life of embankment is 50 years, the critical value of the mean annual air temperature is -3.5 ℃. Namely, in the areas where the mean annual air temperature is higher than -3.5 ℃, the critical embankment height does not exist. |
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| Keywords: | critical embankment height gravel road surface mean annual air temperature numerical studies |
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