Experiment of the Intensified Artificial Freezing on Reaming Borehole Filled with Heat Conductive Material in Local Strata
LIU Bo
CHEN Yuchao
LI Dongyang
HUANG Peige
HUANG Mian
WANG Kaiqiang
Abstract：According to great heat transfer difference of strata in shaft construction projects with the artificial freezing method,a freezing optimization scheme,which boreholes filled with heat conduction material in local difficult-to-freeze strata,was proposed to intensify local freezing strata and realize optimization for cold energy utilization.In order to verify effect of the intensified freezing method,artificial freezing tests using a single freezing pipe covered with heat conduction materials were conducted to freeze water-rich sandy soils.The temperature field distribution and frozen wall?s characteristics of two different frozen wall sections were analyzed with two different flow rate of calcium chloride solution.The freezing pipe within heat conduction material could increase wall thickness by 20.3%,and reduce average temperature by 4.5℃ of frozen wall.The intensified freezing effect could be more obvious when calcium chloride solution flows rate increased.
Keywords：heat conductive materialfreezing pipetemperature fieldintensified freezingoptimization for cold energy utilization
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 5-9 )