人民长江2024，Vol.55Issue(2)：164-170,7.DOI:10.16232/j.cnki.1001-4179.2024.02.021
软岩中TBM停机状态下岩机相互作用规律研究
Interaction law between shield and rock under TBM shutdown in soft rock
司才龙 1侯亚鹏 2刘高2
作者信息
- 1. 甘肃省水利水电勘测设计研究院有限责任公司,甘肃 兰州 730030
- 2. 兰州大学 土木工程与力学学院,甘肃兰州 730000
- 折叠
摘要
Abstract
When TBM is used for construction in soft rock environment,TBM shutdown is often required in case of accidents such as jamming or equipment maintenance and replacement.Reserved deformation and shutdown time are the key to the safe op-eration of TBM.Based on the Liupanshan mudstone tunnel of Bailong River diversion project,according to the actual geological conditions,tunnel structure and TBM construction process,the deformation characteristics of surrounding rock and its interaction with shield under TBM shutdown were studied by numerical calculation method,and the reasonable reserved deformation and shut-down time were analyzed.The results showed that:①The sandy mudstone in the project was extremely soft rock with significant rheology and conforms to the CVisc and Burgers models.Sufficient reserve margin and rapid excavation could ensure the safe pas-sage of TBM.②During the shutdown period,the deformation of surrounding rock had a significant time-space effect.The de-formation was fast at first and then slow.The vertical displacement was greater than the horizontal displacement,and the displace-ment of surrounding rock in the shield rear was greater than that in the front.③The space-time effect of rock-shield interac-tion was manifested as a process of non contact-local contact-complete contact-strong extrusion from bottom to top and from back to front.④The safe shutdown time of TBM with reserved deformation of 10 cm should not exceed 7 days.The research re-sults have theoretical reference significance for understanding the rock-machine interaction during TBM shutdown in soft rock.关键词
软岩/TBM/停机时间/流变/岩机相互作用/Cvisc模型/六盘山隧洞Key words
soft rock/TBM/shutdown time/rheology/rock-shield interaction/CVisc/Liupanshan mudstone tunnel分类
建筑与水利引用本文复制引用
司才龙,侯亚鹏,刘高..软岩中TBM停机状态下岩机相互作用规律研究[J].人民长江,2024,55(2):164-170,7.
