盾构机防扭块断裂分析及优化改造

Fracture Analysis and Optimization of Anti-torsion Block of Shield Machine

盾构机是集机电液一体化的大型地下施工设备,是目前隧道施工重要的工具。防扭块的设计是为了防止盾体因一些客观因素发生小范围的扭转。通过对盾体扭转过程的受力分析,为有限元分析提供输入的变量参数数值,结合有限元分析的结果与实际防扭块断裂的情况,得出防扭块断裂的具体原因,以此对其进行结构优化,并对优化后的结构进行有限元分析,验证了改进后的结构的可靠性。

Shield machine is a large-scale underground construction equipment integrating electro-hydraulic integration,and it is an important tool for tunnel construction at present.The anti-torsion block is designed to prevent the shield body from twisting in a small range due to some objective factors.Through the force analysis of the torsion process of the shield body,the input variable parameter value is provided for the finite element analysis,and the result of the finite element analysis is combined with the actual anti-torsion block fracture situation,and the specific reasons for the anti-torsion block fracture are obtained.The structure is optimized,and finite element analysis is performed on the optimized structure again to verify the reliability of the improved structure.