基于摩尔-库仑准则的双护盾TBM掘进参数研究  

Research on the Parameters of Double-shield TBM Based on Mohr-Coulomb Criterion

作　　者：王玉锁[1] 何俊男[1] 吴浩[1] 冯高飞[1] 李正辉[1] 王涛[1] 周良[1] 王志龙[1] 

机构地区：[1]西南交通大学,成都610031

出　　处：《铁道工程学报》2017年第5期83-88,共6页Journal of Railway Engineering Society

摘　　要：研究目的:青岛地铁在国内首次将双护盾TBM应用于城市轨道交通工程,并取得成功,拓宽了双护盾TBM的应用领域。本文结合双护盾TBM在青岛地铁2号线的应用,基于Mohr-Coulomb准则,根据双护盾TBM正常掘进情况下的刀盘推力、撑靴撑力、围岩强度之间需要满足的力学协调性,针对不同围岩级别,对双护盾TBM施工中掘进参数及模式选择进行研究,从而为双护盾TBM选型及适应性分析提供依据。研究结论:(1)对于Ⅱ级、Ⅲ级、Ⅳ级围岩地层,刀盘推力可由撑靴提供,可采用双护盾掘进模式;(2)Ⅴ级围岩(软岩、强风化)条件下,撑靴撑力、围岩承载力及刀盘推力三者不能满足力学协调性,滚刀无法成功破岩,故无法实施双护盾模式施工,可采用单护盾掘进模式,由管片方式提供反力;(3)根据双护盾TBM正常掘进情况下的刀盘推力、撑靴撑力和围岩强度之间的力学协调性,得到不同围岩级别下相应的掘进参数;(4)该研究成果可为城市轨道交通工程TBM施工提供理论参考。Research purposes： In the field of urban rail transit, the double - shield TBM was applied successfully in Qingdao subway for the first time. According to the mechanical coordination of cutter thrust force, support boots force, and strength of surrounding rock, the tunneling parameters and the mode selection can be obtained in the double shield TBM construction based on Mohr - Coulomb criterion, which was combined with the application of the double shield ＂IBM in Qingdao metro. The research provides the basis for choosing the types and the adaptability of the double shield ＂IBM. Research conclusions： （ 1 ） The double shield TBM can be advanced successfully with the double shield model in surrounding rock of class l],llI and IV,and the cutter thrust force can be provided by support boots. （2）Becanse the mechanical coordination of cutter thrust force, support boots force and strength of surrounding rock cannot be met, the double shield TBM cannot be advanced successfully under the double shield model. Then the single shield model was selected in surrounding rock of class V, and the react force was provided by concrete segment. （3）The tunneling parameters in different surrounding rock conditions can be obtained according to the mechanical coordination of cutter thrust force, support boots force, and strength of surrounding rock under normal tunneling circumstance. （4） The results of research can provide a theoretical reference for the design and construction of TBM in the field of the urban rail transit.

关 键 词：双护盾TBM 掘进参数 掘进模式 摩尔-库仑准则 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]