基于施工条件下的盘形滚刀破岩数值研究  

Numerical Study on TBM Disc Cutter While Breaking Rock Based on Construction Condition

作　　者：杨晨 张娜 荆留杰 Yang Chen;Zhang Na;Jing Liujie(China Railway Engineering Equipment Group Co. Ltd. , Zhengzhou He＇ nan 450016, China)

机构地区：[1]中铁工程装备集团有限公司,河南郑州450016

出　　处：《铁道建筑技术》2017年第11期120-123,共4页Railway Construction Technology

基　　金：国家重点基础研究发展计划(2015CB058100)

摘　　要：考虑到全断面硬岩掘进机盘形滚刀破岩时受力情况的复杂性,利用大型有限元软件ANSYS/LS-DYNA对滚刀受力进行研究。依托于吉林引水工程地质与TBM设备参数,建立滚刀-岩石三维数值模型,并将数值结果与现场实际掘进参数对比验证数值模型的准确性,在此基础上获得不同刀间距与贯入度下滚刀受力的变化规律。模拟结果展示了破岩过程中滚刀所受到的垂直力随破岩距离的增长而剧烈振荡变化,在贯入度定值下,滚刀所受到的垂直力随着刀间距的增加而增大,滚动力受刀间距影响不大;在刀间距定值下,随着贯入度的增加,垂直力与滚动力均逐渐增加。研究结果可为改善盘形滚刀的设计、延长其使用寿命提供一定的理论指导。Considering the complication of rock breaking about TBM disc cutter, a three-dimensional dynamic rock breaking model for TBM disc cutter was established based on the engineering geology and TBM equipment parameter of Jilin water diversion projects by the finite element software ANSYS/LS-DYNA. The validity of the model was verified by comparing with actual excavation parameter. Based on the model, the influence of cutter space and penetration depth on the cutting force was obtained. Simulation results indicated severe variation of vertical force of the cutter with increase in cutting distance during cutting process. When penetration depth kept constant, the normal force of the cutter would gradually increase, while the rolling force almost remained constant with the increasement of the cutter space. When cutter space kept constant, both normal force and rolling force would increase with the increasement of the penetration depth. The research results could offer some theoretical guidance for improving the design and prolonging the lifespan of the disc cutter.

关 键 词：TBM 盘形滚刀 数值模拟 受力分析 刀间距 贯入度 

分 类 号：U455.31[建筑科学—桥梁与隧道工程]