Influence parameter analysis and optimization design of disk-shaped roller cutter on TBM rock breaking efficiency
To investigate the impact of disc cutter geometry on TBM rock-breaking efficiency,based on the ge-ological parameters of the Fuzhou Coastal Express Line project,a disc cutter rock-breaking model was created using ABAQUS.By optimizing the structural parameters of a single cutter,the effects of multiple-cutter rock-breaking methods on tunneling efficiency were analyzed.Results show that cutting width and penetration depth have the greatest impact on rock-breaking;with the increase in cutting width and penetration depth,the rolling force,vertical force and rock volume gradually increase,reaching the best rock-breaking effect when the cut-ting width is 20mm and penetration depth is 10mm.The efficiency of synchronous rock breaking with double disc cutters is significantly higher than that of sequential rock breaking,and the optimal cutter spacing is 60 mm.With the increase of the rotation radius of the four-disc cutter,the tangential force,vertical force and combined force acting on the hob increase.The lateral force presents an increasing trend before decreasing and reaches its maximum value at the circumference of 350mm.The research results can provide a basis for the se-lection of TBM cutters and the optimization design of construction schemes for the Fuzhou Coastal Express Line project.
ABAQUS numerical simulationdisc cutter structure parametersdisc cutter spacingrotary rock breaking
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