...
  • 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 >An equivalent anchoring method for anisotropic rock masses in underground tunnelling
【24h】

An equivalent anchoring method for anisotropic rock masses in underground tunnelling

机译：地下隧道各向异性岩体的等效锚固方法

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

Rock bolting has been widely utilized for reinforcing underground openings, such as tunnels and mining. To ease the complexity of numerically simulating of the bolted rock mass, a novel method for equivalent anchoring simulates the reinforcement effect of the bolts by considering the anisotropic characteristics of the layered rock mass. The jointed material model in ABAQUS is improved by incorporating the anisotropy through the programming language FORTRAN. Based on the improved jointed material model, the equivalent anchoring parameters of the bolted layered rock masses are studied through a series of numerical tests. The numerical outcomes reveal that the improved jointed material model can be used to simulate the anisotropic features of the layered rock mass by comparing the classic and analytic solutions. The degree to which the supporting parameters affect the equivalent reinforcement performance are different in anisotropic rock masses, and the sensitivity of their influence is bolt length bolt spacing bolt diameter. Furthermore, an equivalent anchoring model for bolted rock masses (the formula of the improved parameter between the ratio of bolt length to tunnel diameter and the ratio of bolt diameter to bolt spacing) is proposed through numerical results analysis by the multiple linear regression method. An application case shows the field monitoring agreed well with the predicted vertical displacement of the tunnel demonstrating the feasibility of the proposed simulation method for the bolted rock mass. The results show the proposed method in this study can be conveniently utilized for efficient simulation of the mechanical behavior of bolted rock masses.
机译：岩石锚固已广泛用于加固地下洞口，例如隧道和采矿。为了减轻锚固岩体数值模拟的复杂性，一种等效锚固的新方法通过考虑层状岩体的各向异性特征来模拟锚杆的加固效果。通过使用编程语言FORTRAN合并各向异性，可以改善ABAQUS中的接头材料模型。在改进的节理材料模型的基础上，通过一系列数值试验研究了锚固层状岩体的等效锚固参数。数值结果表明，通过比较经典解和解析解，改进的节理材料模型可用于模拟层状岩体的各向异性特征。各向异性岩体中支撑参数对等效配筋性能的影响程度不同，其影响的敏感性为螺栓长度>螺栓间距>螺栓直径。通过多元线性回归的数值分析，提出了锚固岩体的等效锚固模型（锚固长度与隧道直径之比和锚固直径与螺栓间距之比的改进参数公式）。一个应用案例表明，现场监测与预测的隧道竖向位移非常吻合，证明了所提出的锚固岩体模拟方法的可行性。结果表明，该研究中提出的方法可以方便地用于高效模拟锚固岩体的力学行为。

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