| 跨越地铁隧道超高层建筑桩筏基础数值模拟及优化设计 |
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| 引用本文： | 谢新宇,吴勇华,姜玮东,吴健,刘开富. 跨越地铁隧道超高层建筑桩筏基础数值模拟及优化设计[J]. 中南大学学报(自然科学版), 2011, 0(10) |
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| 作者姓名： | 谢新宇 吴勇华 姜玮东 吴健 刘开富 |
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| 作者单位： | 浙江大学软弱土与环境土工教育部重点实验室;汉嘉设计集团;浙江理工大学建筑工程学院; |
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| 基金项目： | 浙江省建设新技术、新产品研制和推广项目(07013) |
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| 摘 要： | 基于某跨越地铁超高层建筑的设计实践,采用Mohr-Coulomb屈服准则,利用ABAQUS建立三维有限元数值模型,研究地铁隧道穿越建筑物基础时对桩筏基础变形和内力的影响,并根据数值计算结果对经验方法的设计进行优化。数值分析结果表明:开挖增大了筏板的弯矩;隧道开挖会引起附近群桩向隧道方向挠曲变形,且前排桩的变形大于后排桩的变形,同一排桩中边桩变形大于中桩变形;隧道开挖对桩的桩身轴力、弯矩及水平变形的影响主要发生于桩顶至3倍隧道埋深的桩身范围内;随着盾构掘进正面推力和径向压力的增大,桩身挠曲变形逐渐减小并最终使桩身发生远离隧道方向的挠曲变形。
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| 关 键 词： | 地铁隧道开挖 桩筏基础 三维数值模拟 盾构施工力 优化设计 |
Numerical simulation and optimized design of piled raft foundation of super-tall building crossing metro tunnel |
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| XIE Xin-yu,WU Yong-hua,JIANG Wei-dong,WU Jian,LIU Kai-fu. Numerical simulation and optimized design of piled raft foundation of super-tall building crossing metro tunnel[J]. Journal of Central South University:Science and Technology, 2011, 0(10) |
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| Authors: | XIE Xin-yu WU Yong-hua JIANG Wei-dong WU Jian LIU Kai-fu |
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| Affiliation: | XIE Xin-yu1,WU Yong-hua2,JIANG Wei-dong2,WU Jian2,LIU Kai-fu3 (1.Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education,Zhejiang University,Hangzhou 310058,China,2.Hanjia Design Group of China,Hangzhou 310005,3.College of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
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| Abstract: | Based on the design practice of a super-tall building crossing metro tunnel,a three-dimensional,elasto-plastic numerical simulation was conducted by using software ABAQUS to investigate the deformation and internal forces of piled raft foundation due to the passage of a metro tunnel.The mohr-coulmb yield criterion was adopted for soil.According to the numerical results,the experiential design was optimized.The numerical results indicate that bending moment of the raft increases due to tunnel excavation.Adja... |
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| Keywords: | metro tunnel excavation piled raft foundation 3-D numerical simulation force of shield construction optimized design |
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