基于物质点法的隧道开挖面失稳破坏数值分析
PDF下载 (111)甄 亮,王剑锋,柳楚楠,孔 雷,桑琴扬,许 达,朱文轩.基于物质点法的隧道开挖面失稳破坏数值分析[J].宁波大学学报(理工版),2026,39(1):36-43.DOI:10.20098/j.cnki.1001-5132.2024.1215
ZHEN Liang,WANG Jianfeng,LIU Chunan,KONG Lei,SANG Qinyang,XU Da,ZHU Wenxuan.Numerical analysis of instability failure of tunnel
excavation face based on material point method
[J].Journal of Ningbo University(Natural Science & Engineering Edition),2026,39(1):36-43.DOI:10.20098/j.cnki.1001-5132.2024.1215
| Title: | Numerical analysis of instability failure of tunnel
excavation face based on material point method |
| 作者: | 甄 亮, 王剑锋, 柳楚楠, 孔 雷, 桑琴扬, 许 达, 朱文轩 |
| Author(s): | ZHEN Liang, WANG Jianfeng, LIU Chunan, KONG Lei, SANG Qinyang, XU Da, ZHU Wenxuan |
| 关键词: | 物质点法; 开挖面稳定性; 破坏形态; 大变形计算 |
| Keywords: | material point method; stability of excavation face; failure shape; large deformation calculation |
| 分类号: | TU451；TU94 |
| DOI: | 10.20098/j.cnki.1001-5132.2024.1215 |
| 文献标识码: | A |
| 摘要: | 开挖面失稳坍塌是隧道施工安全的重大威胁之一，合理设计隧道开挖面极限支护压力和预测开挖面失稳破坏影响范围是隧道施工安全的保障。采用自编隐式物质点法（Material Point Method，MPM）程序对隧道开挖面失稳机制进行研究。首先通过理论和试验对比，验证了隐式MPM模拟开挖面稳定性的可行性。随后建立工程尺度的隧道模型，分析土体摩擦角对隧道开挖面坍塌和地层变形响应的影响。结果表明：（1）隐式MPM可有效捕捉掌子面失稳-破坏全过程特征；（2）在临界状态下，隧道掌子面的极限支护力、失稳区域和地表沉降均随土体摩擦角的增加呈负相关关系；（3）当隧道掌子面发生倒塌破坏时，涌入隧道的土体质量与土体摩擦角呈负相关关系。 |
| Abstract: | The instability of excavation face is one of the major threats to the safety of tunnel construction. A reasonable design of support pressure limit for the excavation face and the prediction of the influence range of excavation face instability are the guarantee to tunnel construction safety. In this paper, the mechanism of excavation face failure is studied by using the self-programmed implicit material point method (MPM) computer program. Firstly, the implicit MPM is validated by comparing with the results obtained from the existing theoretical and experimental results. Subsequently, a series of field-scale numerical simulations are conducted to explore the influence of soil friction angle on tunnel face collapse and formation deformation response. The results show that: (1) Implicit MPM can capture the whole process of instability and failure of the palm surface effectively; (2) Under critical state, the ultimate support force, instability area and surface settlement of the tunnel face all show a negative correlation with the increase of soil friction angle; (3) There is a negative correlation between the mass of soil pouring into the tunnel and the friction angle of soil when the tunnel face collapses. |
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| 备注/Memo: | 收稿日期：2024-12-26 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：上海市交通委员会科研项目（JT2022-KY-021） 第一作者：甄 亮，博士/高级工程师，主要研究方向为地下工程理论与施工技术。E-mail: 348130339@qq.com *通信作者：朱文轩, 博士/助理研究员，主要研究方向为岩土数值分析。E-mail: zhuwx1992@sjtu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
