摘要
为开发出适合在小转弯隧道中使用的新型滚刀刀圈,在磨粒磨损原理的基础上,通过研究CSM刀圈侧边受力模型、边缘滚刀破岩机制、磨损量预测公式,进行滚刀切削岩石试验,建立了刀圈与岩石接触力模型,分析了转弯段边缘滚刀刀圈受力情况、针对性设计了偏刃刀圈,并在山东文登小转弯半径隧道掘进段工况下进行常规刀圈和偏刃刀圈工业试验。得出结论如下:1)TBM掘进直线隧道时边缘滚刀所受侧向力不可忽视,侧向力与刀圈同岩石的接触面积和所受的压力有关;2)在直线工况掘进下的边缘滚刀外侧岩石几乎不发生破坏,边缘滚刀内侧对岩石具有“刮擦剪切效应”,刀圈内侧所受侧向力远大于外侧;3)转弯段刀圈内侧受力严重偏离了正压力方向,加速边缘滚刀刀圈内侧的磨损;4)在掘进距离达145.43 m时,19^(#)和20^(#)刀位的偏刃刀圈较常规刀圈磨损速率分别降低7.4%和17.5%。因此,偏刃刀圈更加适用于小转弯工况下的隧道掘进。
In order to develop a new offset blade cutter ring which is suitable for the construction condition of the tunnel with small turning radius,the paper carries out the following research work:First,based on the principle of abrasive wear,the side force model of the CSM cutter ring,the rock breaking mechanism of the edge hob,and the wear prediction formula are studied.Second,by conducting a hob rock cutting experiment,a contact force model between the cutter ring and the rock is established.Third,the force condition of the edge cutter ring in the turning section is analyzed,and the offset blade cutter ring is designed.At last,in the construction condition of the small turning radius tunnel in Wendeng of Shandong province,the industrial tests of conventional cutter ring and offset blade cutter ring are carried out.The conclusions are drawn as follows:1)When TBM is tunneling a straight tunnel,the lateral force exerted by the edge hob can not be ignored,which is related to the contact area of the cutter ring with the rock and the pressure.2)During straight tunneling,the rock on the outside of the edge hob is hardly broken,while the inside of the edge hob has"scratching shear effect"on the rock,and the lateral force of the cutter ring exerted by the inside is much greater than the outside.3)The force exerted by inside of the cutter ring at the turning section has badly deviated from the normal pressure direction,which accelerates the wear on the inside of the edge hob cutter ring.4)When the tunneling distance reaches 145.43 m,compared with the conventional cutter ring,the wear rates of the offset blade cutter ring of No.19 and No.20 are decreased by 7.4%and 17.5%respectively.So the offset blade cutter ring is more suitable for tunneling in the construction condition of small turning.
作者
徐艳群
姜海峰
尚勇
李英发
郭浩
芦海俊
XU Yanqun;JIANG Haifeng;SHANG Yong;LI Yingfa;GUO Hao;LU Haijun(Shandong Wendeng Pumped Storage Co.,Ltd.,Weihai 264205,Shandong,China;Tunnel Equipment Manufacturing Co.,Ltd.,China Railway Engineering Equipment Group,Xinxiang 453011,Henan,China)
出处
《隧道建设（中英文）》
北大核心
2020年第S02期306-313,共8页
Tunnel Construction
关键词
常规刀圈
偏刃刀圈
磨损速率
小转弯半径隧道
TBM
conventional cutter ring
offset blade ring
wear rate
small turning radius tunnel
TBM
