上海长江隧道冻土帷幕温度场动态演化机理  

Dynamic Evolution Analysis on Frozen Wall Temperature of Cross Passage of Shanghai Yangtze River Tunnel

作　　者：李攀[1,2] 谢雄耀[1,2] 季倩倩 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海长江隧桥建设发展有限公司,上海201209

出　　处：《同济大学学报（自然科学版）》2013年第4期515-521,共7页Journal of Tongji University:Natural Science

基　　金：国家"九七三"重点基础研究发展计划(2011CB013800);上海市科委重点项目(10231203300);中央高校基本科研业务费专项资金

摘　　要：研究了上海长江隧道联络通道冻土帷幕温度动态演化过程.运用ANSYS有限元软件建立了较为符合实际工程的三维实体模型,考虑了管片散热、冷排管等影响,用比焓值随温度的变化来反应相变潜热的动态变化过程.研究和总结了冻土帷幕温度动态演化机理,包括冻土帷幕发展规律、交圈规律、平均温度发展规律及冻土帷幕有效厚度发展规律.研究结果表明,冻土帷幕温度场的形成是一个有规律可循的连续性发展过程.有限元分析的冻土帷幕交圈时间、平均温度和冻土帷幕有效厚度与工程实测数据比较吻合.The dynamic evolution process of frozen wall temperature in construction of Shanghai Yangtze River Tunnel is studied by finite element method. With a consideration of the effect of heat radiation of tunnel lining and refrigerate battery, a three- dimensional solid element modal is built to simulate the construction process, in which the latent heat of phase change is indicated by way of Enthalpy application. The law of frozen wall development, frozen wall closure, average temperature and effective thickness is summed up. Research demonstrates that the forming process of the frozen wall is successive and follows rules. The time of the frozen wall closure, the average temperature and the thickness agree well with the on-site test data, which validates the numerical results.

关 键 词：联络通道 有限元 冻结法 冻土帷幕 

分 类 号：X705[环境科学与工程—环境工程]