东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

地铁双线隧道施工人工冻结水热力数值分析

期刊名称：交通运输工程学报
时间：0
页码：67-72+82
语言：中文
分类：U455.49[建筑科学—桥梁与隧道工程;交通运输工程—道路与铁道工程]
作者机构：[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
相关基金：国家863计划项目（2008AA11Z103）;国家基础科学人才培养基金项目（J0630966）;中国科学院西部行动计划（二期）项目（KZCX2-XB2-10）;国家自然科学基金项目（40601023,40730736）
相关项目：多年冻土区块碎石类路基气块耦合传热模型研究

关键词：隧道工程, 双线隧道, 人工冻结法, 数值分析, tunnel engineering, double-line tunnel, artificial freezing method, numerical analysis

中文摘要：

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9．1mm，因而人工冻结法施工能有效地控制地表沉降量。

英文摘要：

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 the safety of frozen wall was evaluated by using the long-term strength of frozen soil. Analysis result shows that the maximum principal stress distributes circularly along freezing pipes when the subway tunnel is constructed by artificial freezing method, and the stress around freezing pipes is obviously high. Excavation has little influence on circular stress field, the surface settlement caused by artificial freezing construction doesn＇t increase with excavation expansion, which is different from other construction methods. The maximum settlement is only 9.1 mm during the whole construction, so the surface settlement can be effectively controlled by artificial freezing method. 2 tabs, 5 figs, 11 refs.

同期刊论文项目