岩土力学2012，Vol.33Issue(4)：1196-1202,1209,8.
基于UDEC的隧道掘进机滚刀破岩数值模拟研究
Research on numerical simulation of rock breaking using TBM disc cutters based on UDEC method
摘要
Abstract
The full-face tunnel boring machine (TBM) has been widely used in projects nowadays; it is significant to understand the key technology of rock breaking by TBM disc cutters. In order to study the rock breaking mechanism and consider the effect of disc cutter rings' cross-section shape, rock strength and joint orientation, we build a series of two-dimensional numerical models of rock broken by disc cutlers using UDEC method and simulate the process of rock fragmentation by TBM disc cutters. The case study and comparative analysis show that rock breaking mechanism is a composition of shear failure and tensile failure; tensile failure is the main reason for crack initiation and propagation. From the numerical results, it is also shown that wider flat cutters and blunter wedge cutters are good at breaking rock; and flat cutters is better than wedge cutters to break hard rocks, while they are same in soft rocks; and disc cutter is good at breaking the jointed rocks which have a joint angle between thirty degrees and sixty degrees; wedge cutter is better than flat cutter to penetrate jointed rocks due to its splitting effect.关键词
隧道掘进机/滚刀/破岩机制/UDEC/数值仿真Key words
tunnel boring machine/ disc cutter/ rock breaking mechanism/ UDEC method/ numerical simulation分类
建筑与水利引用本文复制引用
莫振泽,李海波,周青春,何恩光,邹飞,朱小明,赵羽..基于UDEC的隧道掘进机滚刀破岩数值模拟研究[J].岩土力学,2012,33(4):1196-1202,1209,8.基金项目
国家杰出青年基金(No.51025935) （No.51025935）
国家973计划项目(No.2010CB732001) （No.2010CB732001）
国家科技支撑计划项目(No.2007BAF09B01) （No.2007BAF09B01）
国家科技支撑计划项目(No.2006BAB04A06). （No.2006BAB04A06）
