| 地铁双线隧道施工人工冻结水热力数值分析 |
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| 引用本文： | 李双洋,张明义,黄志军,董元宏.地铁双线隧道施工人工冻结水热力数值分析[J].交通运输工程学报,2009,9(1). |
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| 作者姓名： | 李双洋 张明义 黄志军 董元宏 |
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| 作者单位： | 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
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家基础科学人才培养基金，中国科学院西部行动计划项目，国家自然科学基金 |
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| 摘 要： | 为了准确分析地铁隧道人工冻结施工过程中的热力学状况,考虑水分迁移和冰水相变耦合影响以及水泥水化热的生成,采用热蠕变本构建立了地铁隧道人工冻结施工的水热力耦合分析模型.对广州地铁某双线隧道施工过程中的热力状况进行了数值模拟,同时应用人工冻土的长期强度对冻结壁安全性进行了评估.分析结果表明:在地铁冻结法施工时,最大主应力沿着冻结管呈环形分布,并且管周围的应力明显偏高;开挖对环形应力场的影响不大,而且与其他施工方法不同,人工冻结法施工引起的地表沉降并不随开挖断面的逐渐扩大而增大,整个施工过程中的最大地表沉量仅为9.1 mm,因而人工冻结法施工能有效地控制地表沉降量.
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| 关 键 词： | 隧道工程 双线隧道 人工冻结法 数值分析 |
Numerical analysis of moisture,thermal and mechanical states for subway double-line tunnel constructed by artificial freezing method |
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| LI Shuang-yang,ZHANG Ming-yi,HUANG Zhi-jun,DONG Yuan-hong.Numerical analysis of moisture,thermal and mechanical states for subway double-line tunnel constructed by artificial freezing method[J].Journal of Traffic and Transportation Engineering,2009,9(1). |
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| Authors: | LI Shuang-yang ZHANG Ming-yi HUANG Zhi-jun DONG Yuan-hong |
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| Institution: | State Key Laboratory of Frozen Soil Engineering;Cold and Arid Regions Environmental and Engineering Research Institute;Chinese Academy of Sciences;Lanzhou 730000;Gansu;China |
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| Abstract: | In order to accurately analyze the thermal and mechanical states of subway tunnel constructed by artificial freezing method,the coupled effects of moisture transfer and phase change of ice and water,the generation of cement hydration heat and thermal creep constitutive relationship were taken into account,and a moisture,thermal and mechanical coupled model was established. The thermal and mechanical states of Guangzhou subway double-line tunnel constructed by artificial freezing method were simulated,and th... |
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| Keywords: | tunnel engineering double-line tunnel artificial freezing method numerical analysis |
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