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首页> 外文期刊>International journal of structural integrity >Temperature analysis of CFG pile composite foundation in high latitudes and low altitude island permafrost
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Temperature analysis of CFG pile composite foundation in high latitudes and low altitude island permafrost

机译：高纬低海拔海岛多年冻土CFG桩复合地基温度分析

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Purpose - Cement fly ash gravel (CFG) pile composite foundation is an effective and economic foundation treatment approach, which is significant to build foundation, subgrade construction, and so forth. The purpose of this paper is to present a research on the temperature behaviours of high-latitude and low-altitude island permafrost under CFG pile composite foundation treatment. Design/methodology/approach - In the process of CFG pile construction, the temperature of permafrost and pile body was monitored using the temperature sensors. The influence of subgrade height and atmospheric temperature cycle on permafrost temperature was analysed by finite element simulation. Findings - In the process of CFG pile construction, the change curve of pile temperature and the temperature of permafrost beside pile following time can be divided into six stages, and the duration of these stages is at least one month. The temperature variation of permafrost while constructing subgrade in FEM has a good agreement with the results of field temperature monitoring. The height of subgrade not only affects the maximum temperature increase of permafrost and the re-frozen time of permafrost after the construction of CFG pile composite foundation, but also affects the temperature variation amplitude of permafrost during atmospheric temperature cycle. Originality/value - The research will provide a reference for the design on the CFG pile composite foundation used for island permafrost and guarantee the stability of the structure; thus, it has an important significance.
机译：目的-水泥粉煤灰砾石（CFG）桩复合地基是一种有效且经济的地基处理方法，对建立地基，路基施工等具有重要意义。本文的目的是研究CFG桩复合地基处理后高纬低岛永久冻土的温度行为。设计/方法/方法-在CFG桩施工过程中，使用温度传感器监控多年冻土和桩身的温度。通过有限元模拟分析了路基高度和大气温度循环对多年冻土温度的影响。发现-在CFG桩施工过程中，桩温度的变化曲线和桩旁的多年冻土温度随时间的变化可分为六个阶段，这些阶段的持续时间至少为一个月。有限元法在修建路基时，多年冻土的温度变化与现场温度监测结果吻合良好。路基高度不仅影响CFG桩复合地基施工后多年冻土的最大温升和多年冻土的再冻时间，而且影响常温循环期间多年冻土的温度变化幅度。原创性/价值-该研究将为岛永久冻土的CFG桩复合地基的设计提供参考，并确保结构的稳定性；因此，它具有重要的意义。

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