地铁联络通道三维冻结温度场有限元分析  

Finite element analysis on 3D freezing temperature field in metro connected aisle construction

作　　者：蔡海兵[1] 黄以春 庞涛 

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]中国煤炭科工集团南京设计研究院,江苏南京210031

出　　处：《铁道科学与工程学报》2015年第6期1436-1443,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51208004);安徽省自然科学基金资助项目(1208085QE87)

摘　　要：人工冻结法在地铁隧道联络通道施工中的应用已相当广泛。地层冻结温度场的预测分析可提前判断冻结壁的发展状况和评定冻结方案的合理性。地铁隧道联络通道冻结法施工中的冻结管群一般设计为倾斜放射状,现行对联络通道冻结温度场的分析大都是简化为平面问题来处理,难以反映实际情况。为此,以上海地铁13号线某区间联络通道冻结法施工为工程背景,综合考虑地层温度、地表对流等各类初始和边界条件以及土体的相变潜热过程,建立三维有限元数值计算模型,对该联络通道积极冻结期的地层三维冻结温度场分布规律进行系统分析,并与现场实测结果相比较,验证了有限元数值分析的可靠性。Artificial freezing method has been widely applied in connected aisle construction in metro. Predictive analysis on stratum freezing temperature field can determine development status of frozen wall and evaluate rationality of freezing scheme in advance. The frozen pipes are generally designed as inclined radial shape in metro connected aisle construction with the use of freezing method. The current analysis on freezing temperature field of connected aisle has been mostly simplified to the plane problem,which is difficult to reflect the actual situation.For this reason,connected aisle construction using freezing method in a interval of Shanghai Metro Line No. 13 is referenced. With the consideration of various initial and boundary conditions such as ground temperature,surface convection and freezing phase change latent heat,etc,3D finite element numerical model is presented. Distributions of the 3D stratum freezing temperature field are systematically analyzed during active freezing period of the connected aisle,which are compared with field measured results to verify the reliability of finite element numerical analysis.

关 键 词：联络通道 冻结法 三维冻结温度场 有限元分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]