基于节理弹塑性模型的隧道围岩稳定性分析

李义钊; 俞然刚; 杨文东; 宋若松; 何嘉乐; 张海强; 高明礼

doi:10.3724/j.gyjzG23092006

基于节理弹塑性模型的隧道围岩稳定性分析

doi: 10.3724/j.gyjzG23092006

中国石油大学(华东)储运与建筑工程学院, 山东青岛 266580

基金项目:

国家自然科学基金项目（51979281）。

详细信息

作者简介:
李义钊，助理工程师，主要从事建设人才培育与职业教育管理，岩土及岩石力学相关研究，L1289986469@outlook.com。

通讯作者:
俞然刚,教授,主要从事建筑物检测、鉴定与加固,水泥、混凝土性能及外加剂,岩土及岩石力学相关研究,yrangang@163.com。

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出版历程
- 收稿日期: 2023-09-20
- 网络出版日期: 2026-01-06

Stability Analysis of Tunnel Envelope Based on Ubiquitous-Joint Model

China University of Petroleum (East China), College of Storage, Transportation and Construction Engineering, Qingdao 266580, China

摘要

摘要: 为研究马蹄形隧道穿越不同倾角节理岩体的开挖稳定性，以青岛地铁8号线某区段台阶法施工为研究对象，运用FLAC^3D节理弹塑性模型进行模拟，分析隧道围岩位移、台阶法施工和剪应力分布规律。结果表明：在节理密集发育的地质中，隧道围岩与节理相交处位移增大；当节理倾向于与马蹄形隧道开挖方向垂直时，节理倾角为0°~30°，节理倾角的增加使变形量减少了16.1%，而当节理倾角为30°~90°，节理倾角的增加使变形量减少8.5%；台阶法比全断面法在破碎岩层中维持掌子面与围岩稳定上更加有利；节理倾角为0°~30°，隧道围岩剪应力玫瑰图呈“蝴蝶”形，节理倾角越大，围岩剪切应力越小。
- 弹塑性模型 /
- 节理岩体 /
- 围岩稳定性 /
- 数值模拟
Abstract: To investigate the excavation stability of horseshoe tunnels through different jointed rock body inclinations， a section of Qingdao Metro Line 8 was selected as the study object， and the FLAC^3Delastic-plastic model of joints was employed for simulation， to analyze the displacement of the tunnel's surrounding rock， the construction of the step method， and the law of shear stress. The findings of the research demonstrated that in geology with dense joint development， the displacement of the tunnel surrounding rock increased at the joint intersections. When joint tendencies were perpendicular to the horseshoe tunnel excavation direction， joint inclination angles ranging from 0° to 30°， the deformation was reduced by 16.1%； and joint inclination angles ranging from 30° to 90°， the deformation was reduced by 8.5%. The step method was more effective than the full-section method in maintaining the stability of the palm face and the surrounding rock in the broken rock layer. For joint inclination angles ranging from 0° to 30°， the shear stress rose diagram of the tunnel's surrounding rock was assumed to have a "butterfly" shape； as the joint inclination angle increased， the shear stress of the surrounding rock decreased.
- elasticity model /
- jointed rock mass /
- surrounding rock stability /
- numerical simulation

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参考文献(15)

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