| Discussion on Theoretical Analysis and Calculation of Settlement and Cracking in Subgrade in Permafrost of the Qinghai-Tibet Plateau |
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| 作者姓名： | Jiang Fuqiang Niu Huaijun Wang Xiaojun |
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| 作者单位： | Northwest Research Institute of China Railway Engineering Corporation, Lanzhou 730000 |
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| 摘 要： | Thedeformingprocessofroadbedsbuilton altitudepermafrostisverycomplicated,whichis relatedtothemechanicsofnon saturatedsoil underlowatmosphericpressure.Thedeformation ofroadbedisalsocloselylinkedtowatermigration andthermalsieveeffect.NowbothinChinaand abroad,there’ssomeunderstandingofwater migrationandthermalsieveeffect.Butsofar,no researchwaseverdoneontheirimpactson roadbeddeformation,northere’sanyresearchon themechanicsofnon saturatedsoilunderlow atmosphericpressure.Thestabilityofroadbedis …
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| 关 键 词： | 青藏铁路 永久冻结带 路基沉降 路基破裂 |
| 收稿时间： | 2006-04-07 |
Discussion on Theoretical Analysis and Calculation of Settlement and Cracking in Subgrade in Permafrost of the Qinghai-Tibet Plateau |
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| Jiang Fuqiang,Niu Huaijun,Wang Xiaojun.Discussion on Theoretical Analysis and Calculation of Settlement and Cracking in Subgrade in Permafrost of the Qinghai-Tibet Plateau[J].Engineering Sciences,2006,4(2):150-157. |
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| Authors: | Jiang Fuqiang Niu Huaijun and Wang Xiaojun |
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| Institution: | (Northwest Research Institute of China Railway Engineering Corporation, Lanzhou 730000);(Northwest Research Institute of China Railway Engineering Corporation, Lanzhou 730001);(Northwest Research Institute of China Railway Engineering Corporation, Lanzhou 730002) |
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| Abstract: | This paper carries on the theoretical analysis on characteristic of settlement and cracking in subgrade in permafrost of the Qinghai-Tibet Plateau, proposed mechanism of settlement and cracking in subgrade in permafrost on the Qinghai-Tibet Railway. Based on the slices divide of section of subgrade, proposes that it is rotated according to artificial permafrost table, and then the cracking of thaw settlement is calculated. Based on the theoretical of V.A. Kudriavtsev about permafrost, calculated distance of frost crack in subgrade. Aim at characteristics of settlement and cracking in subgrade in permafrost of the plateau the principle of unequal migration of unfrozen water and deformation caused by thermo sieve effect is firstly used. Considering the relationship between deformation and time, the theoretical mode of calculating cracking is in the paper. |
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| Keywords: | Settlement and cracking in roadbed permafrost Qinghai-Tibet Railway |
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