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>Discussion on Theoretical Analysis and Calculation of Settlement and Cracking in Subgrade in Permafrost of the Qinghai-Tibet Plateau
Discussion on Theoretical Analysis and Calculation of Settlement and Cracking in Subgrade in Permafrost of the Qinghai-Tibet Plateau
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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