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《Chinese Journal of Underground Space and Engineering》 2013-03
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Sensitivity Analysis on Position of Temperature Measuring Points of Bakholdin Solution in Double-Row-Pipe Freezing

Song Yingjie1,Hu Xiangdong2,Chen Lei3(1.Department of Energy and Environment Engineering,China Enfi Engineering Corporation,Beijing 100038,China; 2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China; 3.China Railway Engineering Consulting Group Co.,Ltd,Railway Line and Station Design & Research Institute,Beijing 100055,China)  
Thickness of frozen soil is an important control parameter in the process of construction using freezing method.During the construction,according to the site measured temperature data and the layout of the freezing holes,Bakholdin formula was used to calculate the thickness of frozen soil.Based on the Bakholdin formula in double-row-pipe freezing,the sensitivity analysis was conducted on the influence of the location of temperature measuring points on the frozen soil thickness in Bakholdin model.The results showed that: in the main section when temperature measuring points were arranged near the boundary of the frozen soil or at the middle of the two-row-pipe,more accurate results were obtained;The test result of the intersection section is related to that of the main section,but the calculation error is less in the intersection section.Based on the result of sensitivity analysis,in order to obtain more accurate results,the temperature measuring points should be arranged near the boundary of the frozen soil or at the middle of the two-row-pipe in the intersection section,so as to ensure the quality and safety of the construction of the project.
【Fund】: 国家自然科学基金资助项目(No.50578120)
【CateGory Index】: TD265.34
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