水利水电技术2018，Vol.49Issue(4)：56-62,7.DOI:10.13928/j.cnki.wrahe.2018.04.009
TBM双滚刀间距及入岩次序对破岩效果影响研究
Study on influencesfrom spacing between dual-disc cutters and rock-penetrating sequence of TBM on rock-breaking effect
摘要
Abstract
In order to study the influences from the spacing between the dual-disc cutters of TBM and the rock-penetratingsequence on rock-breaking effect,a rock-breaking model for the TBM with dual-disc cutters is established with the 2-D particle flow code (PFC2D),and then the changes of fissure expansion,rock failure mode,rock-fragment area,rock-breaking specific energy,disc cutter thrust,etc.during the rock-breaking process of TBM are simulated.The result shows that (1) the spacing between the disc cutters has a more significant influence on the rock-breaking effect.When the spacing is too small,the rockfragments formed between the disc cutters are over-crushed,while if the spacing is too large,the fissures formed by the adjoining disc cutters cannot be broken through and a rock ridge is to be formed between both of them.If the spacing is different,the rockbreaking specific energy is different too,thus a phenomenon of optimal spacing between the disc cutters exists there.(2) The rock penetrating sequence of the disc cutters influences the rock-breaking effect.The rock damage depths and ranges of the front and the rear disc cutters are different,while the vertical forces necessary for the left and right cutters are more approximate during rock-breaking and the mean value of the vertical force necessary for the rear disc cutter is less than that for the front one during the rock-breaking in sequence.The rock-breaking specific energy of the rock-breaking in sequence is higher than that of the simultaneous rock-breaking under the condition of the same spacing between disc cutters,but the rock-breaking effect is to be lower than that from the simultaneous rock-breaking.The study result can provide a certain reference for the design of the layout of disc cutters for TBM.关键词
隧道工程/TBM双滚刀/颗粒流软件/破岩效果/滚刀间距/入岩次序Key words
tunnelling engineering/dual-disc cutters of TBM/particle flow code (PFC2D)/rock-breaking effect/spacing between disc cutters/rock-penetrating sequence分类
交通运输引用本文复制引用
刘立鹏,刘海舰,傅睿智,孙兴松..TBM双滚刀间距及入岩次序对破岩效果影响研究[J].水利水电技术,2018,49(4):56-62,7.基金项目
国家自然科学基金项目(51609266) （51609266）
中国水利水电科学研究院基本科研业务费专项项目(GE0145B452016,GE0145B822017) （GE0145B452016,GE0145B822017）
国家重点研发计划课题(2016YFC0401804) （2016YFC0401804）
