TBM两级螺旋式刀盘出渣机制数值模拟研究  

A Numerical Simulation Study on the Mucking Mechanism of TBM Two-stage Spiral Cutterhead

作　　者：耿麒 张兴宇[1] 贺飞 齐志冲 汪学斌[1] 叶敏[1] 张大庆 GENG Qi;ZHANG Xingyu;HE Fei;QI Zhichong;WANG Xuebin;YE Min;ZHANG Daqing(National Engineering Research Lab of Highway Maintenance Equipment,Chang′an University,Xi′an 710064;Central Design and Research Institute,China Railway Engineering Equipment Group Co.,Ltd.,Zhengzhou 450016;SUNWARD Equipment Co.,Ltd.,Changsha 410100)

机构地区：[1]长安大学公路养护装备国家工程实验室,西安710064 [2]中铁工程装备集团有限公司设计研究总院,郑州450016 [3]山河智能装备股份有限公司,长沙410100

出　　处：《现代隧道技术》2023年第2期84-93,124,共11页Modern Tunnelling Technology

基　　金：国家自然科学基金(52278390);陕西省自然科学基金(2022JM-172);长安大学中央高校基本科研业务费高新培育项目(300102251201)。

摘　　要：针对现有全断面岩石隧道掘进机(TBM)两级刀盘出渣缺乏合理的结构方案和优化设计方法,采用颗粒离散元方法构建数值模型模拟TBM两级刀盘出渣过程,并进行出渣缩比试验验证数值模型的可靠性。通过数值模拟研究出渣口排布与尺寸、螺旋形式与螺距、一/二级刀盘直径比、刀盘转速等因素对出渣性能的影响规律。结果表明:螺旋式结构是TBM两级刀盘有效的出渣结构方案;各因素对两级刀盘综合出渣性能的影响程度由大到小依次为刀盘转速>一级刀盘背部出渣口长度>后螺旋螺距。对于掘进直径为8 m的两级螺旋式刀盘,建议其最优结构形式和参数为:面、背部出渣口同位且有前后螺旋,后螺旋螺距0.85 m,一级刀盘背部出渣口长0.9 m,一/二级刀盘直径比不大于0.55,刀盘转速不大于6 r/min。To address the lack of reasonable structural solutions and optimized design methods for the mucking of two-stage cutterhead of existing full-face rock tunnel boring machines(TBMs),this study constructs a numerical model using the particle discrete element method to simulate the mucking process of two-stage cutterhead of TBMs,so as to verify the reliability of the numerical model through scaled mucking tests.Numerical simulations are carried out to investigate the influence of various factors,including mucking outlet arrangement and size,spiral form and pitch,diameter ratio of primary/secondary cutterheads,and cutterhead rotation speed,on the performance of muck⁃ing.The results show that the spiral structure is an effective structural solution for mucking of TBM two-stage cutter⁃head,and the impact degree of each factor on the integrated mucking performance of two-stage cutterhead is,in de⁃scending order,cutterhead roation speed>length of back outlet of the primary-stage cutterhead>rear spiral pitch.For a two-stage spiral cutterhead with a tunnelling diameter of 8 m,the optimal structural form and parameters are recommended to be:the face and back muck outlets are in the same position with front and rear spirals,and specifi⁃cally,the rear spiral pitch should be 0.85 m,the back muck outlet of the primary-stage cutterhead should be 0.9 m long,the diameter ratio of the primary/secondary-stage cutterhead should be no more than 0.55,and the cutterhead rotation speed should not exceed 6 r/min.

关 键 词：全断面岩石隧道掘进机 两级刀盘 出渣 螺旋 颗粒离散元 

分 类 号：TU94[建筑科学—建筑技术科学] U455.31[建筑科学—桥梁与隧道工程]