Study on the Distribution Law and Sensitivity of Heat-Fluid Coupling Temperature Field of Pipe Curtain Freezing Method
In order to get the pipe curtain frozen soil temperature field under the seepage action change rule and temperature sensitivity influencing factors,a heat-fluid coupling model was established using finite element numerical software.The temperature field distribution characteristics of the pipe curtain freezing method was analyzed by controlling the presence or absence of seepage conditions in the model and setting temperature paths.The results show that under the action of seepage,the frozen soil curtain develops unevenly,with a larger freezing range on the downstream side compared to the upstream side,and the overall thickness decreases.The freezing effect at Point 5 in the densely freezing pipe area is less susceptible to seepage compared to Point 1 in the scattered freezing pipe area,and the temperature difference is more significant in the zones where seepage can directly penetrate.The changes in specific heat capacity and thermal conductivity have a more significant impact on the temperature variation at Point 1.As the thermal conductivity increases and the specific heat capacity decreases,the final temperature of the soil becomes lower.
seepage actionhydrothermal couplingpipe curtain freezingpermafrost curtainfinite element simulation
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