基于离散元—有限元耦合数值方法的白云岩地层盾构滚刀破岩能力研究  

Research on Rock-breaking Ability of Shield Cutterhead in Dolomite Stratum Based on Discrete-element and Finite-element Coupled Numerical Method

作　　者：齐明山 王祥 王春凯 陈光友 Qi Mingshan;Wang Xiang;Wang Chunkai;Chen Guangyou(hanghai Urban Construction Design and Research Institute(Group)Limited,Shanghai 200125,China;不详)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海市200125 [2]贵阳市公共交通投资运营集团有限公司 [3]西南交通大学交通隧道工程教育部重点实验室

出　　处：《工具技术》2025年第3期85-93,共9页Tool Engineering

基　　金：国家自然科学基金区域创新发展联合基金(U21A20152);国家自然科学基金面上项目(52278416)。

摘　　要：盾构滚刀的破岩能力是影响盾构掘进的关键因素之一。以贵阳地铁三号线为工程依托,结合实际工程地质概况和相关施工参数,建立离散元—有限元耦合精细化滚刀破岩模型,利用Python接口并基于PSO粒子群优化算法得到最优细观参数,研究盾构掘进过程中不同贯入度下的单、双刃滚刀组合,以及不同安装半径下单刃滚刀和正面滚刀组合对盾构滚刀破岩能力的影响,并结合理论预测模型进行验证。结果表明:在贯入度较小时,滚刀所受的垂直力呈线性增加趋势;随着贯入度增大,滚刀对岩体的破碎效果变好,最后趋于稳定;单刃滚刀旋转破岩时,随着安装半径的增大,滚刀所受的垂直力在波动中缓慢增大;正面滚刀组合破岩的过程是逐步破碎岩体并均匀剥离碎裂岩体的过程,组合破岩能在一定程度上降低滚刀所受的垂直力。通过滚入度和安装半径对滚刀力学性能和破岩效果分析和验证,为盾构隧道工程中滚刀破岩参数的设计提供参考。The rock-breaking ability of shield cutterheads is a critical factor affecting the tunneling process in shield tunneling construction.Taking the construction of the Guiyang Metro Line 3 as the engineering background,a refined rock-breaking model for the cutterhead is established based on the discrete-element and finite-element coupled method,incorporating the actual geological conditions and relevant construction parameters.The optimal micro-parameters are obtained using the Particle Swarm Optimization(PSO)algorithm.This study investigates the influence of single and double-edge cutterhead combinations at different penetration depths during shield tunneling,as well as the impact of single-edge and face cutterhead combinations at different installation radii on the rock-breaking ability of the shield cutterhead,and validates the results with theoretical prediction models.The results indicate the following:at low penetration depths,the vertical force acting on the cutterhead shows a linear increasing trend.With increasing penetration depth,the rock-breaking effect of the cutterhead improves and eventually stabilizes.During the rock-breaking process of the single-edge cutterhead rotation,the vertical force acting on the cutterhead slowly increases within fluctuations as the installation radius increases.The rock-breaking process of the face cutterhead combination involves gradually breaking and uniformly peeling off the fragmented rock.The combination rock-breaking process can to some extent reduce the vertical force acting on the cutterhead.By analyzing the effects of penetration depth and installation radius on the mechanical performance and rock-breaking effectiveness of the cutterhead,and conducting validation,this study provides reference for the design of rock-breaking parameters for cutterheads in shield tunneling engineering.

关 键 词：隧道工程 离散元—有限元耦合 盾构滚刀 安装半径 贯入度 破岩效果 

分 类 号：TG702[金属学及工艺—刀具与模具] TH164[机械工程—机械制造及自动化] U455[建筑科学—桥梁与隧道工程]