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- W2352511159 abstract "Based on field measurement data,the analysis,which is related to the heat transfer process of the permafrost engineering and the temperature change results,is vital to understand the stability trend of frozen soil foundation. Combined with the latest monitoring data of the frozen soil foundation long-term monitoring system in the Qinghai—Tibet direct current(DC) transmission line project,the heat transfer process of the tower foundation is analyzed preliminarily. It is found that the soil around the tower foundation is frozen overall after experiencing the first freezing period at the monitoring sites. Influenced by construction,permafrost conditions and other factors,the ground temperature around tower foundation differs from the natural filed below the permafrost table. Then,having experienced the melt period,the bottom soil of the tower foundation is frozen at the monitoring fields. During the heating process in the warm season,increasing rate of ground temperature and the thaw depth are mainly influenced by the form of tower foundations and permafrost condition. As a result,the temperature increasing at different monitoring sites varies from each other. The permafrost thermal regime near the pile foundation is better than that near the large excavation foundation such as column foundation and fabricated foundation. The heat pipes is used to protect the permafrost significantly at some sites. However,the heat pipe's cooling effect is limited by permafrost temperature and heat transfer process at several sites when the foundation pits are excavated. Moreover,the temperature field around the foundation pit was still in dynamic changing process." @default.
- W2352511159 created "2016-06-24" @default.
- W2352511159 creator A5001000403 @default.
- W2352511159 date "2013-01-01" @default.
- W2352511159 modified "2023-09-26" @default.
- W2352511159 title "ANALYSIS OF HEAT TRANSFER CHARACTERISTICS OF FROZEN SOIL FOUNDATION IN QINGHAI—TIBET DC TRANSMISSION LINE PROJECT" @default.
- W2352511159 hasPublicationYear "2013" @default.
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