• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tunnelling and underground space technology >Three-dimensional numerical simulation of pile-twin tunnels interaction - Case of the Shiraz subway line
【24h】

Three-dimensional numerical simulation of pile-twin tunnels interaction - Case of the Shiraz subway line

机译：双桩隧道相互作用的三维数值模拟-以设拉子地铁线为例

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The use of an underground transportation network to solve urban traffic problems is a practical solution. Shiraz, one of the most famous touristic cities of Iran, is developing its own urban railway network using mechanized twin tunnels. It is almost inevitable for tunnels to pass nearby an existing pile foundations. In this study, a three-dimensional numerical model was developed to investigate the pile-tunnel interaction. All the mechanized excavation phases of an EPB-TBM (Earth pressure balance, Tunnel boring machine) and the segmental lining were modeled using a finite difference code. The role of the Constitutive soil's model is also investigated by using both a linear elastic-perfectly plastic one (failure criteria of Mohr-Coulomb type) named as MC and a nonlinear perfectly plastic one the Cap-Yield (CYsoil) constitutive model. Two different scenarios were considered: the influence of tunneling on existing piles and the impact of installing bridge piles nearby existing twin tunnels. The influence of the soil/structure interaction is presented in terms of surface settlements, forces induced in the tunnel lining and forces along the piles. It should be noted that on the base of the obtained results, the MC model cannot accurately estimate the ground settlements and the forces in tunnel and piles, therefore it is necessary to use advanced constitutive models like CYsoil for design purposes.
机译：使用地下交通网络解决城市交通问题是一种切实可行的解决方案。设拉子是伊朗最著名的旅游城市之一，它正在使用机械化双隧道开发自己的城市铁路网络。隧道在附近现有的桩基附近通过几乎是不可避免的。在这项研究中，建立了三维数值模型来研究桩-隧道的相互作用。使用有限差分代码对EPB-TBM（地压平衡，隧道掘进机）的所有机械化开挖阶段和分段衬砌进行建模。还通过使用名为MC的线性弹性完全塑性塑性模型（莫尔-库仑类型的破坏标准）和采用Cap-Yield（CYsoil）本构非线性非线性塑性模型研究了本构土壤模型的作用。考虑了两种不同的情况：隧道对现有桩的影响以及在现有双隧道附近安装桥桩的影响。土壤/结构相互作用的影响表现为地表沉降，隧道衬砌中引起的力和沿桩的力。应该注意的是，基于所获得的结果，MC模型无法准确估计地面沉降以及隧道和桩中的力，因此出于设计目的，有必要使用CYsoil等高级本构模型。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号