红水河2024，Vol.43Issue(4)：10-15,21,7.DOI:10.3969/j.issn.1001-408X.2024.04.003
敞开式TBM穿越超长距离断层破碎带处理措施
Treatment Measures for Open TBM Crossing Overlength Fault Fracture Zone
吴盛1
作者信息
- 1. 广西壮族自治区水利电力勘测设计研究院有限责任公司,广西 南宁 530023
- 折叠
摘要
Abstract
The tunnel with a length of 16.07 km in the first section of the north trunk canal in the first-phase project of Letan Reservoir Irrigation Area in Guangxi is constructed using a tunnel boring machine(TBM),which needs to cross an overlength fault fracture zone.In view of the complex geological conditions of the overlength fault fracture zone of the tunnel,measures such as TBM backward method advanced grouting,Mcnally system support,encrypted steel arch frame,bolt-shotcrete support and consolidation grouting are proposed for reinforcement and support.A two-dimensional excavation deformation stability finite element analysis is carried out on the B17+757.000 m section,and the deformation and stress of the tunnel surrounding rock and lining are calculated under two working conditions of unsupported and supported.The results show that the reinforcement measures can effectively control the development of deformation and stress;Under the condition of supporting,the deformation of surrounding rock is effectively suppressed,and the stress around the tunnel is significantly improved.The measures taken can successfully solve the problem of TBM crossing the overlength fault fracture zone in limestone area.关键词
敞开式TBM/超长断层破碎带/加固支护Key words
open TBM/overlength fault fracture zone/reinforcement support分类
建筑与水利引用本文复制引用
吴盛..敞开式TBM穿越超长距离断层破碎带处理措施[J].红水河,2024,43(4):10-15,21,7.
