首页|渗流条件下圆锥形冻结壁温度场数值分析

渗流条件下圆锥形冻结壁温度场数值分析

扫码查看
为得到盾构隧道端头圆锥形冻结壁加固结构在渗流条件下的温度场的变化规律,文中运用COMSOL有限元数值模拟软件建立三维瞬态水热耦合模型,通过设置模型两侧边界水头差和2条观测路径对圆锥形冻结壁的发展、封闭性等变化情况进行研究,结果表明越靠近圆锥形锥部区域的冻结壁厚度越小,且随着水头差的增大,冻结壁朝渗流方向偏移程度越大,整体冻结壁厚度减小;路径1中最接近冻结管的5#点在冻结8d冻结壁交圈,其他点越靠近冻结管降温越快;路径2中靠近圆锥形锥部的6#点与底部的10#点在冻结20d前后降温速率出现较大变化,所得结果可为类似冻结工程设计提供参考.
NUMERICAL ANALYSIS OF TEMPERATURE FIELD OF CONICAL FREEZING WALL UNDER SEEPAGE CONDITION
In order to obtain the variation law of temperature field of the conical frozen wall reinforcement structure at the end of shield tunnel under the action of seepage, a three-dimensional transient hydrothermal coupling model is established by using COMSOL finite element numerical simulation software. By setting the head difference between the two sides of the boundary of the model and two observation paths, the development of the conical freezing wall, closure and other changes are studied. The results show that the thickness of the freezing wall is small when it is close to the conical cone area. With the increase of the head difference, the freezing wall towards the seepage direc-tion of the degree of offset and the overall thickness of the freezing wall decreases. 5# point in Path 1 freezes in 8d with ice intersection circle, the other points cool faster as when they are closer to the freezing tube. Cooling rate sub-stantially changes near the conical cone part of the 6# point and the bottom of the 10# point in Path 2 at the freezing time of 20d. The results may provide the reference for the design of similar freezing projects.

shield tunnel endconical freezing wallfreezing acthydrothermal coupling

刘冰、周杰、胡俊

展开 >

中铁建城建交通发展有限公司,江苏苏州215000

中铁二十局集团有限公司三亚分公司,海南三亚572023

海南大学土木建筑工程学院,海口570228

盾构隧道端头 圆锥形冻结壁 冻结法 水热耦合

海南大学横向科研项目

HD-KYH-2022405

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(3)
  • 10