Assessing cutter-rock interaction during TBM tunnelling in granite:Large-scale standing rotary cutting tests and 3D DEM simulations

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外文摘要：The widespread utilisation of tunnel boring machines(TBMs)in underground construction engineering requires a detailed investigation of the cutter-rock interaction.In this paper,we conduct a series of large-scale standing rotary cutting tests on granite in conjunction with high-fidelity numerical simulations based on a particle-type discrete element method(DEM)to explore the effects of key cutting parameters on the TBM cutter performance and the distribution of cutter-rock contact stresses.The assessment results of cutter performance obtained from the cutting tests and numerical simulations reveal similar dependencies on the key cutting parameters.More specifically,the normal and rolling forces exhibit a positive correlation with penetration but are slightly influenced by the cutting radius.In contrast,the side force decreases as the cutting radius increases.Additionally,the side force shows a positive rela-tionship with the penetration for smaller cutting radii but tends to become negative as the cutting radius increases.The cutter's relative effectiveness in rock breaking is significantly impacted by the penetration but shows little dependency on the cutting radius.Consequently,an optimal penetration is identified,leading to a low boreability index and specific energy.A combined Hertz-Weibull function is developed to fit the cutter-rock contact stress distribution obtained in DEM simulations,whereby an improved CSM(Colorado School of Mines)model is proposed by replacing the original monotonic cutting force distri-bution with this combined Hertz-Weibull model.The proposed model outperforms the original CSM model as demonstrated by a comparison of the estimated cutting forces with those from the tests/simulations.The findings from this work that advance our understanding of TBM cutter performance have important implications for improving the efficiency and reliability of TBM tunnelling in granite.

外文关键词：

Large-scale standing rotary cutting testDiscrete element method(DEM)simulationCutter-rock interactionImproved CSM(Colorado School of Mines)modelCutting force

作者：

Xin Huang、Miaoyuan Tang、Shuaifeng Wang、Yixin Zhai、Qianwei Zhuang、Chi Zhang、Qinghua Lei

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作者单位：

Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai,China

College of Civil Engineering and Architecture,Xinjiang University,Urumqi,China

State Key Laboratory of Geotechnical Engineering,Ministry of Education,Tongji University,Shanghai,China

China Shipbuilding NDRI Engineering Co.,Ltd.,Shanghai,China

Shanghai Tunnel Engineering Co.,Ltd.,Shanghai,China

Shanghai Shield Design and Experimental Research Center Co.,Ltd.,Shanghai,China

Department of Earth Sciences,Uppsala University,Uppsala,Sweden

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationPostdoctoral Fellowship Program of China Postdoctoral Science Foundation

项目编号：

52278407523784072023M732670

出版年：

2024

DOI：

10.1016/j.jrmge.2024.03.019

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(9)