X img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索
作者投稿 专家审稿 编辑办公 编委办公 主编办公

冰川冻土 ›› 2003, Vol. 25 ›› Issue (6): 621-627.

• 冻土物理与寒区工程 • 上一篇    下一篇

昆仑山多年冻土隧道施工温度影响分析

张学富1, 苏新民2, 赖远明1, 喻文兵1, 吴亚平1,3   

  1. 1. 中国科学院, 寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃, 兰州, 730000;
    2. 铁道第一勘察设计院, 桥隧处, 甘肃, 兰州, 730000;
    3. 兰州铁道学院土木建筑学院, 甘肃, 兰州, 730030
  • 收稿日期:2003-01-20 修回日期:2003-05-14 出版日期:2003-12-25 发布日期:2012-04-26
  • 作者简介:张学富(1972-),男,重庆合川人,2001年在兰州铁道学院获硕士学位,现为中国科学院寒区旱区环境与工程研究所博士研究生,主要从事桥梁结构的数值分析、岩土与隧道工程的设计与施工以及寒区岩土工程数值计算等方面的工作研究.E-mail:xfzhang@ns.lzb.ac.cn
  • 基金资助:
    国家杰出青年科学基金项目(40225001);国家自然科学基金项目(40171019);中国科学院"百人计划"资助项目(A类);中国科学院知识创新工程重大项目(KZCXl-SW-04)资助

Analyzing the Effect of Tunneling on Temperature of Permafrost in the Kunlun Mountains, Tibetan Plateau

ZHANG Xue-fu1, SU Xin-min2, LAI Yuan-ming1, YU Wen-bing1, WU Ya-ping1,3   

  1. 1. State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China;
    2. Department of Bridge and Tunnel Engineering, The First Survey and Design Institute of China Railway, Lanzhou Gansu 730000, China;
    3. School Civil Engineering and Architecture, Lanzhou Railway University, Lanzhou Gansu 730030, China
  • Received:2003-01-20 Revised:2003-05-14 Online:2003-12-25 Published:2012-04-26

摘要: 青藏铁路昆仑山隧道现场实测气温和地温资料表明,施工期间隧道衬砌现浇混凝土水化热、冬季施工采取的保温措施以及其它人为活动,造成了该隧道围岩的多年冻土融化较多.考虑水分迁移和冰水相变耦合影响,根据瞬态温度场问题的热量平衡控制微分方程和质量迁移方程,应用伽辽金法推导出了有限元计算公式,在ANSYS计算软件的工作平台上开发了计算软件.运用该计算软件对昆仑山隧道施工期间的融化进行了回冻预测分析,结果表明:保温材料对昆仑山隧道的回冻起着阻碍作用.在现场观测寒区隧道围岩的温度和应力时,必须考虑施工期间的融化圈的影响,而观测时间要长一些,否则,测量的温度和应力与隧道稳定后的温度和应力将有较大的差异.

关键词: 水分迁移, 施工影响, 保温材料, 数值分析

Abstract: From in-situ measurement of air temperature and ground temperature inside the Kunlunshan Tunnel in the Qinghai-Tibet Railway, it is found that the thawed range of the permafrost surrounding the tunnel is very large, due to the hydration heat of the concrete lining, insulation measures during winter and other artificial activities. In this paper, taking water transfer and phase change into account, the finite element formulae of this problem and computer program on the base of ANSYS Software are derived from the governing differential equations and water transfer equations using Galerkin’s method. Using the computer program, forecast analysis for the re-freezing of the Kunlunshan Tunnel is made. The analysis shows that insulation will delay the re-freezing. The thawed range of the permafrost surrounding the tunnel in cold regions caused by tunneling must be considered. The observation duration should be prolonged, because much time is needed for the tunnel going to be stable.

Key words: water transfer, tunneling effect, insulation material, numerical analysis

中图分类号: 

  • TU445