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[1]王华伟,康正阳,王英才,等.极硬岩条件下盾构滚刀掘进过程数值模拟[J].油气储运,2024,43(07):819-826832.[doi:10.6047/j.issn.1000-8241.2024.07.011]
　WANG Huawei,KANG Zhengyang,WANG Yingcai,et al.Numerical simulation study of tunneling process using TBM disc cutter under extremely hard rock condition[J].Oil & Gas Storage and Transportation,2024,43(07):819-826832.[doi:10.6047/j.issn.1000-8241.2024.07.011]
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极硬岩条件下盾构滚刀掘进过程数值模拟

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年07期 页码: 819-826832 栏目: 工艺与工程 出版日期: 2024-07-25
Title:
Numerical simulation study of tunneling process using TBM disc cutter under extremely hard rock condition
文章编号:
1000-8241（2024）07-0819-08
作者:
王华伟1; 康正阳2; 王英才2; 刘四进1; 刘鹏1
1.中铁十四局集团有限公司; 2.南京工业大学机械与动力工程学院
Author(s):
WANG Huawei1; KANG Zhengyang2; WANG Yingcai2; LIU Sijin1; LIU Peng1
1.China Railway 14th Bureau Group Co. Ltd.; 2.School of Mechanical and Power Engineering, Nanjing Tech University
关键词:
盾构机; 极硬岩; 滚刀; 有限元法
Keywords:
tunnel boring machine (TBM);  extremely hard rock;  disc cutter;  finite element method
分类号:
TE89
DOI:
10.6047/j.issn.1000-8241.2024.07.011
文献标志码:
A
摘要:
【目的】有限元法是研发新型硬岩滚刀的常用方法，为构建合理的新型硬岩滚刀有限元模型（Finite Element Model,FEM）亟需提升模型的计算精度与计算效率。【方法】从岩石破碎学、材料学角度出发，针对芜湖过江工程中19in（1in=2.54cm）光面滚刀、长三角区域混合花岗岩岩层条件，构建盘形滚刀的有限元线性切割模型；引入网格密度因子λ，通过网格局部加密技术实现λ在0.5~4.0之间取值，将不同取值下的计算结果与学者Rostami所修正的科罗拉多矿业学院预测模型（Cutting Stress Model,CMS）进行对比，对所建FEM进行验证。【结果】虽然λ的取值对滚刀FEM的破岩规律无明显影响，但超前破坏效应与过度破坏效应均与λ有关，因此FEM的计算精度与计算效率均对λ取值较为敏感：对于计算精度而言，平均滚动力与平均垂直力的计算精度随λ增大呈先下降后上升的趋势，λ=2.5时FEM与CSM的平均垂直力最为接近，接近度为98.5％，λ=3.0时两模型的平均滚动力最为接近，接近度为99.8％；对于计算效率而言，FEM的计算求解时间随λ增大呈上升趋势，λ=4.0时的求解时间约为λ=0.5时的15倍，且存在较优λ取值能够兼顾求解精度与求解效率。【结论】仿真研究中应选取λ=3.0作为FEM的最优网格密度因子，其计算效率比λ=2.5时可提升近30％，研究结果可为计算精度与计算效率更高的新型硬岩滚刀FEM的建立提供理论框架。（图11，表1，参21）
Abstract:
[Objective] The finite element method is recognized as a common tool in the realm of researching and developing new disc cutters tailored for hard rock applications. This study aims to construct coherent Finite Element Models (FEMs) to offer enhanced calculation accuracy and efficiency. [Methods] Drawing upon theoretical insights from rock fragmentation and materials science, a FEM linear cutting model was established to replicate the 19 inch smooth disc cutter used for tunneling across the Wuhu River, integrating the migmatitic granite stratum conditions prevalent in the Yangtze River Delta region. Notably, a grid refinement factor λ was introduced, and its values were maintained within the range from 0.5 to 4.0, through the local grid refinement technique. The subsequent computational results corresponding to different λ values were compared with the results of the Cutting Stress Model (CSM) modified by Rostami to verify the developed FEM. [Results] Although the value of λ exhibited no apparent influence on the rock-breaking behaviors shown by the FEM, it was found to be associated with both advance failure and excessive failure effects. This indicates that the accuracy and efficiency of the FEM are sensitive to the value of λ. Specifically, the accuracy of calculating the average rolling force and average vertical force initially decreased and then increased with rising values of λ. With λ=2.5, the average vertical forces from the FEM and the CSM got closest, with an approximation of 98.5%. With λ=3.0, the resulting average rolling forces of the two models were closest, with an approximation of 99.8%. In terms of efficiency, the time spent on calculations and solving increased with higher values of λ in the FEM. For instance, the time required at λ=4.0 was roughly 15 times that atλ=0.5. The computational results also suggested that a judicious selection ofλbenefits both accuracy and efficiency. [Conclusion] The recommended value for λ stands at 3.0, serving as the optimal grid refinement factor for the FEM in simulation studies, presenting an enhancement in calculation efficiency of nearly 30%, compared with the results obtained at λ=2.5. The outcomes of this study lay down a theoretical framework for crafting FEMs with elevated calculation accuracy and efficiency for novel disc cutters tailored for hard rock applications. (11 Figures, 1 Table, 21 References)

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备注/Memo

王华伟，男，1973年生，教授级高工，1996年毕业于西南交通大学地下工程与隧道工程专业，现主要从事隧道与地下工程研究与管理方向的研究工作。地址：江苏省南京市浦口区园广路中铁十四局集团大盾构研究院1213室，210000。电话：13335277128。Email：wanghuawei.14g@crcc.cn
基金项目：中国铁建股份有限公司科研课题“常压刀盘刀筒结构改进及智能感知管控系统研发与应用”，2022-B07；中铁十四局集团有限公司科研课题“新型滑动滚刀、智能刀具、新式刀筒研制及刀具科学管理系统”，913700001630559891202107。
· Received: 2024-01-06 · Revised: 2024-03-11 · Online: 2024-04-11

更新日期/Last Update: 2024-07-25