土工基础

›› 2015, Vol. 29 ›› Issue (3): 100-104.

• 工程实录 • 上一篇    下一篇

考虑炭质片岩流变特性的隧道支护时机优化研究

李细咏1，冯 凌1，韩志强2，3   

  1. (1.湖北省交通规划设计院,武汉 430051；2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室,武汉 430071；3.中国电力科学研究院,北京 100055)
  • 收稿日期:2015-04-09 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:李细咏（1967-），男，高级工程师,研究方向为公路工程设计及施工管理等。

Optimization of Tunnel Supporting Time Considering Rheological Properties of Metamorphic Schist

LI Xiyong1,FENG  Ling1，HAN Zhiqiang2,3   

  1. （1.Hubei Communication Planning and Design Institute Co., Ltd., Wuhan 430051；
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071；3.China Electric Power Research Institute, Beijing 100055)
  • Received:2015-04-09 Online:2015-06-20 Published:2015-06-26

摘要： 对于炭质片岩这种具备典型流变特性的岩体，采用Burgers模型与MohrCoulomb准则串联型式的修正Burgers模型，能够较好地表征其黏弹塑性变形特点。通过离散元数值模拟方法及反分析手段，对挤压变形明显的炭质片岩区域隧道段落进行了流变参数辨识，进而讨论了炭质片岩与支护间的相互作用机理。最后综合数值分析、回归模型预测及现场监测结果，研究了炭质片岩区域隧道围岩支护时机的优化。

关键词: 炭质片岩, 隧道, 流变, 相互作用, 支护时机

Abstract: For soft rock that having rheological properties, like the carbonaceous schist, the modified Burgers model, which is the combination of Burgers model and Mohr-Coulomb model, can characterize its visco-elastic-plastic deformation behavior. In a tunnel excavation project, the squeezed deformation zone with soft rock mass was numerical analyzed and the rheological model parameters are calibrated throughout the back analysis. The paper discusses the interactions between the carbonaceous schist rock mass and the supporting structures. The optimization of the time for the tunnel excavation supporting is made possible by using the numerical analysis results, regression analysis results and the construction monitoring data.

Key words: Carbonaceous Schist, Tunnel Excavation, Rheological Properties, Interactions, Time to Support