| 城市超小净距暗挖隧道施工动态数值模拟分析 |
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| 引用本文： | 徐搴,赵德安,余云燕.城市超小净距暗挖隧道施工动态数值模拟分析[J].兰州铁道学院学报,2010,29(1):112-117. |
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| 作者姓名： | 徐搴 赵德安 余云燕 |
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| 作者单位： | 兰州交通大学土木工程学院;西北民族大学; |
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| 摘 要： | 采用CRD工法及相关辅助工法对在冲积层中,洞间距仅为1 m,围岩软弱的城市浅埋双洞隧道进行暗挖施工,用数值模拟方法实现了这一复杂开挖施工过程.该方法主要运用有限差分程序,利用应力释放法及三维实体模型对隧道的开挖施工过程进行了三维动态模拟分析,总结了隧道拱顶、地表、地层沉降规律,研究了开挖施工中地层的塑性破坏区变化情况和中间岩柱的受力特点等,并将模拟数据与相关实测数据进行比较,认为此法合理、可行,可为以后的设计和施工提供参考.
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| 关 键 词： | 超小净距隧道 CRD工法 有限差分法 数值模拟 沉降 |
Dynamic Numerical Simulation and Analysis of Super-small Clear Distance Underground Excavated Tunnel in the City |
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| XU Qian,ZHAO De-an,YU Yun-yan.Dynamic Numerical Simulation and Analysis of Super-small Clear Distance Underground Excavated Tunnel in the City[J].Journal of Lanzhou Railway University,2010,29(1):112-117. |
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| Authors: | XU Qian ZHAO De-an YU Yun-yan |
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| Institution: | 1.School of Civil Engineering/a>;Lanzhou Jiaotong University/a>;Lanzhou 730070/a>;China/a>;2.Northwest University for Nationalities/a>;Lanzhou 730030/a>;China |
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| Abstract: | CRD method and assisted methods are used to excavate the super-small clear distance and shallow-depth tunnel in the weak rock.It consists two tunnels of which distance is only 1m.The complicated process of excavation is simulated by the numerical simulation method.The finite difference procedure,the stress-release method and the three-dimensional solid model are utilized to achieve the three-dimensional simulation and analyze the tunnels' construction.Then the subsidence regularity of the tunnel vault,the e... |
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| Keywords: | super-small clear distance tunnel CRD method finite difference method numerical simulation subsidence |
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