| 上方大面积加(卸)载引起盾构隧道的变形分析 |
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| 引用本文： | 王涛,李浩,徐日庆.上方大面积加(卸)载引起盾构隧道的变形分析[J].现代交通技术,2008,5(3):29-31. |
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| 作者姓名： | 王涛 李浩 徐日庆 |
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| 作者单位： | 1. 江苏省交通规划设计院有限公司,江苏,南京,210005
2. 浙江大学软弱土与环境土工教育部重点实验室,浙江,杭州,310027 |
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| 摘 要： | 盾构隧道上方大面积加载或卸载会引起隧道结构发生纵向变形，过大的沉降或隆起会使隧道结构发生裂缝或是环缝张开，导致渗漏水甚至破坏。把隧道结构等效为处于土层中的弹性地基梁，利用Boussinesq解计算加（卸）载在隧道下卧土层中产生的附加应力，基于Winkler模型计算隧道结构的变形。结合上海某地铁隧道上方大面积卸载后加载的工程实例，计算隧道结构的纵向变形，判断结构的安全性，并用有限元计算验证理论计算公式的正确性。
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| 关 键 词： | 盾构隧道 加载 卸载 Winkler地基模型 变形 |
Analysis of Deformation of Shield Tunnel When Vertical Loading and Unloading |
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| Wang Tao,Li Hao,Xu Riqing.Analysis of Deformation of Shield Tunnel When Vertical Loading and Unloading[J].Modern Transportation Technology,2008,5(3):29-31. |
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| Authors: | Wang Tao Li Hao Xu Riqing |
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| Institution: | Wang Tao, Li Hao, Xu Riqing (1 .Jiangsu Provincial Communication Planning and Designing Institute Co., Ltd, Nanjing 210005, China; 2.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310027, China) |
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| Abstract: | The loading and unloading above the tunnel in large area will induce longitudinal displacement of tunnel, which may induce longitudinal crack of tunnel segment joint, result in seepage or even destroy. Regards the tunnel as a continuous beam embedding in the soil, Boussinesq solution is used to calculate additional stress in tunnel-based soil. Based on Winkler model,the deformation of tunnel is calculated.Combining with a project of loading and unloading above shield tunnels in Shanghai, the longitudinal deformation of tunnels is analyzed by Winkler elastic foundation beam method and finite element method, and the results from Winkler elastic foundation beam method are validated, and then the safety of the tunnels is judged, |
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| Keywords: | shield tunnel loading unloading Winkler-based model deformation |
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