基坑冻土帷幕冻结温度场变化规律试验研究  

Experimental study on temperature field variation of curtain of foundation pit frozen soil

作　　者：王明威 潘殿琦[1] 王伟[1] 丁雪涛 邓振鹏 崔宏业 Wang Mingwei;Pan Dianqi;Wang Wei;Ding Xuetao;Deng Zhenpeng;Cui Hongye(School of Prospecting and Surveying,Changchun Institute of Technology,Changchun 130021,China)

机构地区：[1]长春工程学院勘查与测绘工程学院,长春130021

出　　处：《低温工程》2022年第4期49-55,69,共8页Cryogenics

基　　金：吉林省科技发展计划项目(20190303079SF)。

摘　　要：为提高基坑冻土挡墙的成墙效率,寻找冻结法施工中温度场的变化规律,指导冻结施工获取最佳冻结强度,基于传热学和工程流体力学对冻土温度场的影响因素进行试验分析,通过有限元ANSYS热力学模块提出了稳态与瞬态相结合的温度场计算新模型。通过试验及数值模拟着重对冻土温度场形成的人为可调控因素进行分析,对冻结管的材质及结构提出了优化方案,同时得出冷冻管间距是影响冻结效果的主要因素,最优冻结管间距为500 mm。To improve the wall forming efficiency of the frozen soil retaining wall of the foundation pit,the change law of the temperature field in the freezing method construction was studied,the freezing construction was guided to obtain the best freezing strength.Based on heat transfer and engineering fluid mechanics,the influencing factors of the temperature field of frozen soil were tested and analyzed.A new temperature field calculation model combining steady state and transient state was proposed through the finite element ANSYS thermodynamics module.Man-made controllable factors formed in frozen soil temperature field were analyzed by test and numerical simulation,and an optimization plan was proposed for the material and structure of the freezing pipe.It is concluded that the freezing pipe spacing is the main factor affecting the freezing effect,and the optimal freezing pipe spacing is 500 mm.

关 键 词：基坑冻土帷幕 温度场 变化规律 ANSYS 

分 类 号：TB663[一般工业技术—制冷工程]