| 城市过街地道施工阶段数值模拟分析 |
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| 引用本文： | 王鑫,张庆贺,陈宇,任国雷.城市过街地道施工阶段数值模拟分析[J].地下空间与工程学报,2011,7(3):534-540. |
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| 作者姓名： | 王鑫 张庆贺 陈宇 任国雷 |
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| 作者单位： | 1.同济大学地下建筑与工程系,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.林同木炎国际工程咨询公司(中国有限公司),重庆 400015 |
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| 摘 要： | 采用有限单元法对暗挖平顶直墙结构的过街地道进行施工阶段分析,按照设计施工步骤对分部开挖后的地层沉降及衬砌内力进行分析,并着重探讨施工过程的衬砌结构力学体系转换,并对此类工程进行风险源分析及提出了对应的工程措施。分析结果表明,超浅埋过街地道需通过地层加固措施控制地表沉降以及保证上部既有管线安全;过街地道的开挖能够保证下部地铁隧道的安全;拆除临时支护使得边墙轴力增大约2~3倍,衬砌弯矩增大约4~5倍;开挖进尺以0.5~1.0 m,左右导坑间距以6~8 m为宜。
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| 关 键 词： | 城市过街地道 平顶直墙结构 数值模拟 衬砌内力转换 |
| 收稿时间： | 2011-12-25 |
Numerical Analysis on Construction of City Pedestrian Underpass |
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| Wang Xin,Zhang Qinghe,Chen Yu,Ren Guolei.Numerical Analysis on Construction of City Pedestrian Underpass[J].Chinese Journal of Underground Space and Engineering,2011,7(3):534-540. |
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| Authors: | Wang Xin Zhang Qinghe Chen Yu Ren Guolei |
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| Affiliation: | 1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;3. T. Y. Lin International Consultants Ltd. (China Ltd.),Chongqing 400015,China |
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| Abstract: | The city pedestrian underpass structure with horizontal roof and straight wall is analyzed using Finite Element Method.It focuses on the transformation of stratum settlement and lining inner force at different construction stages.The mechanical system transformation of lining structure during construction is studied and the risk source of such project is analyzed with relevant countermeasures put forward.The analysis results show that the ground consolidation should be adopted to insure the safety of underg... |
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| Keywords: | city pedestrian underpass horizontal roof and straight wall structure numerical simulation lining inner force transformation |
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