Study on artificial three-tube freezing model test and freeze program
CHEN Junhao
LIU Tongyu
LI Dongwei
Abstract：In order to master the development law of artificial three tube temperature field,based on Gubei frozen air shaft,the paper carried out the indoor three-tube freezing model test,studied the effects of different freezing parameters on the temperature field of frozen wall,combined with finite element calculation and field test method,the results of the model test were compared and analyzed.The results showed that the spacing of the freezing pipe ring opening holes increased 0.1 m,the frozen wall circle time delayed about 4 d.The inner ring tube diameter increased 1 m,the well help temperature increased about 1.5 ℃.The outer ring tube diameter increased 1 m,the effective thickness of the frozen wall increased about 0.4 m.The average temperature of the freezing wall was mainly affected by the ring and radial distance of the frozen hole.At the project site,through optimizing the frozen tube layout circle diameter and adjusting the frozen hole spacing size to reduce the number of frozen holes,it could also ensure the freezing effect and reduce the project cost.
Keywords：artificial three circle tubefreezing schemetemperature fieldmodel test
Publication Date：2017-01-01