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Modeling and prediction for the thrust on EPB TBMs under different geological conditions by considering mechanical decoupling

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Science China(Technological Sciences) 2016年第9期59卷 1428-1434页

作者： ZHANG Qian SU CuiXia QIN QingHua CAI ZongXi HOU ZhenDe KANG YiLian Key Laboratory of Modern Engineering Mechanics Tianjin University Tianjin 300072 China China Railway Construction Heavy Industry Co. Ltd. Changsha 410100 China College of Engineering and Computer Science Australian National University Canberra ACT 0200 Australia

EPB TBMs(Earth pressure balance Tunneling Boring Machines) are extensively used in tunneling constructions because of its high efficiency and low disturbance on structures above ground. It is critically significant to predict the thrust acting on TBMs under different geological conditions for both the design of power system and the control of tunneling process. The interaction between the cutterhead and the ground is the core of excavation, through which geological conditions determine the thrust re-quirement combined with operating status and structural characteristics. This paper conducted a mechanical decoupling analysis to obtain a basic expression of the cutterhead-ground interactive stress. Then more engineering factors(such as cutterhead topological structure, underground overburden, thrusts on other parts, etc.) were further considered to establish a predicting model for the total thrust acting on a machine during tunneling. Combined with three subway projects under different geological conditions in China, the model was verified and used to analyze how geological, operating and structural parameters influence the acting thrust.

关键词： EPB TBMs thrust prediction different geological conditions mechanical decoupling

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A data-driven approach for modeling and predicting the thrust force of a tunnel boring machine

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浙江大学学报(英文版)A辑:应用物理与工程 2023年第9期24卷 801-816页

作者： Lintao WANG Fengzhang ZHU Jie LI Wei SUN School of Mechanical Engineering Dalian University of TechnologyDalian 116024China North Automatic Control Technology Institute Taiyuan 030006China

thrust prediction of a tunnel boring machine(TBM)is crucial for the life span of disc cutters,cost forecasting,and its design *** factors affect the thrust of a *** rock pressure on the shield,advance speed,and cutter water pressure will all have a certain *** addition,geological conditions and other random factors will also influence the thrust and greatly increase the difficulty of modeling it,seriously affecting the efficiency of tunnel *** overcome these challenges,this paper establishes a thrust prediction model for the TBM based on the combination of on-site quality record data and surrogate model ***,the thrust composition and influencing factors are analyzed and the thrust is modeled using a surrogate model based on field *** main factor screening based on the Morris method,the accuracy of the surrogate model is greatly *** Kriging model with the highest accuracy is selected to model the thrust and predict the thrust of the unexcavated *** results show that the thrust model has better thrust prediction by selecting similar conditions for modeling and reasonably increasing modeling *** thrust prediction method of TBM based on the combination of field data and surrogate model can accurately predict the dynamic thrust of the load and can also accurately estimate its statistical characteristics and effectively improve the excavation plan.

关键词： Tunnel boring machine(TBM) thrust prediction Surrogate model Morris method

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