Load condition and connecting reliability technology for TBM cutterhead connection bolt
Since the cutterhead connecting bolt is vulnerable to breakage in TBM during excavation,in this article efforts are made to explore the TBM cutterhead's diameter,the selection of the main bearing,as well as the connecting reliability of the cut-terhead connection bolt.Firstly,based on a tunnel project,the force model of TBM cutterhead is set up,so as to further analyze the loads on the cutterhead connecting bolt under four complex working conditions.Secondly,the cutterhead connection bolt's fa-tigue strength is checked,in order to provide theoretical principles and basis for the selection of the main bearing.Finally,the ANSYS simulation software is used to explore the cutterhead connection bolt's structural strength and rigidity before and after op-timizing its force model.The results show that after optimization,the maximum stress on the bolt reduces by 46.3％and the total deformation reduces by 8.6％.At the same time,it is verified that when the main bearing is small,the cutterhead connection bolt is most likely to break when it is trying to deal with emergencies.
TBM cutterhead connection boltload conditionchecking of cutterhead connection boltfinite-element analysis
万方数据
维普
