太原理工大学学报2025，Vol.56Issue(2)：327-337,11.DOI:10.16355/j.tyut.1007-9432.20230565
考虑THM耦合效应的富水砂层冻结效果评价
Evaluation of Freezing Effect of Water-Rich Sand Layer Considering THM Coupling Effect
摘要
Abstract
[Purposes]The artificial freezing method is often used in subway tunnel crossing the water-rich sand layer,and is subjected to the synergistic action of heat,flow,and force fields during soil freezing process.It is of great significance to study the multi-field coupling freezing effect for the application of artificial freezing method to ensure the effectiveness of soil water sealing and reinforce-ment.[Methods]Therefore,on the basis of the engineering background of artificial freezing method in Kunming Metro,a three-dimensional horizontal cup-type freezing thermal-fluid-force coupling field(THM)model was established,and the effects of cooling plan,groundwater seepage velocity,and formation saturation on freezing effect were investigated,and compared with measured results.[Findings]The results show that the higher the seepage velocity of groundwater,the more obvious the freezing effect is in the downstream frozen zone.The larger the seepage velocity,the larger the thickness difference between the upper and lower frozen walls.For different cooling schedule condi-tions,the freezing effect of-25℃cooling schedule is the best.The vertical displacement and horizon-tal displacement caused by frost heave increase with the increase of saturation.The growth rate of ver-tical displacement is greater than that of horizontal displacement,the maximum vertical displacement is 8.43 mm,and the horizontal displacement is less than 1.80 mm.In practical engineering,the frost heave stress affects the adjacent structures,so the risk of instability,leakage,and shield axis devia-tion can be avoided by secondary grouting and melt sink grouting combined with pipe segments.关键词
热-流-力(THM)耦合/富水砂层/冻结效果/地铁联络通道/人工冻结法Key words
thermal-hydraulic-mechanical coupling/rich water sand layer/freeze effect/subway connecting passage/artificial freezing method分类
建筑与水利引用本文复制引用
沙立中,叶万军,赵兵,汤明建,浦同茂,周子豪,符晓..考虑THM耦合效应的富水砂层冻结效果评价[J].太原理工大学学报,2025,56(2):327-337,11.基金项目
中铁十九局集团有限公司科技研究开发计划项目(21-Z03) （21-Z03）
