新型楔平组合式TBM滚刀切削极硬岩性能研究  

Study on Cutting Performance of New Wedge-flat Combined TBM Cutters in Extreme Hard Rocks

作　　者：耿麒 黄登侠 陈建勋[3] 刘伟伟[3] 罗彦斌[3] 马茂勋 李晓斌 李鹏 乔浩利 GENG Qi;HUANG Dengxia;CHEN Jianxun;LIU Weiwei;LUO Yanbin;MA Maoxun;LI Xiaobin;LI Peng;QIAO Haoli(School of Construction Machinery,Chang'an University,Xi'an 710064;China Communications Construction Central South Engi-neering Bureau Co.,Ltd.,Changsha 410116;School of Highway,Chang'an University,Xi'an 710064)

机构地区：[1]长安大学工程机械学院,西安710064 [2]中交中南工程局有限公司,长沙410116 [3]长安大学公路学院,西安710064

出　　处：《现代隧道技术》2025年第1期114-124,共11页Modern Tunnelling Technology

基　　金：国家自然科学基金资助项目(52278390);中交一公局集团项目(X-GL-QSGS(J)-XIJ-WY-05-JS-80).

摘　　要：针对极硬岩地质下,全断面岩石隧道掘进机(TBM)平刃滚刀破岩效率低但耐磨损、楔刃滚刀破岩效率高但易磨损的特点,提出一种新型楔平组合式滚刀,并探究其刀圈结构对破岩和磨损的影响。首先,从某山岭隧道现场采集抗压强度超过230MPa的极硬闪长岩,进行单轴压缩、巴西劈裂和小尺度滚刀直线切削的试验与仿真,验证所用数值方法的合理性;然后,考虑楔平组合式滚刀圈的刃宽比和分区数目影响,开展全尺度滚刀顺次直线破岩数值仿真,分析破岩法向力、切向力、比能和比磨损功的变化规律。结果表明:楔平组合式滚刀破岩载荷呈现明显多阶段波动形态,平刃切削段载荷明显大于楔刃切削段载荷;刃宽比对破岩载荷、效率和刀圈磨损具有明显影响,而分区数目的影响不明显;建议刃宽比取0.5以兼顾破岩效率和耐磨性能,分区数目取4或6。In response to the characteristic that flat type cutters of full-face rock tunnel boring machines(TBMs)have low rock-breaking efficiency but are wear-resistant in extreme hard rocks,and wedge type cutters have high rock-breaking efficiency but are prone to wear,a new wedge-flat combined cutter was proposed and the influence of cutting ring structure on rock breaking and wear were explored.Firstly,uniaxial compression,Brazilian splitting,and small-scale linear cutting tests and simulations were conducted on extremely hard diorite(exceeding 230 MPa)collected from a tunnel project to verify the accuracy of the numerical methods.Then,considering the influences of the width ratio of wedge ring segment to flat ring segment and the number of wedge or flat ring segments,full-scale numerical simulations for linear rock breaking were performed in sequence to study the change rules of rock-break⁃ing normal force,rolling force,specific energy,and specific wear work.Research results indicate that the rock break⁃ing load of the wedge-flat combined rings exhibited a clear multi-stage fluctuation pattern,and the load of the flat ring segment was significantly greater than that of the wedge ring segment;The ratio of wedge ring width to flat ring width had a significant impact on rock-breaking load,efficiency,and cutter ring wear,while the effect of the number of wedge or flat ring segments was not significant;It is recommended to set the width ratio of the wedge ring segment to flat ring segment to 0.5 to balance efficient rock breaking and wear resistance,and set the number of wedge or flat segments to 4 or 6.

关 键 词：全断面岩石隧道掘进机 楔平组合式滚刀 滚刀破岩 滚刀磨损 有限元 

分 类 号：U455.3[建筑科学—桥梁与隧道工程]