Research On Key Technology Of Shield Segment Erector

With the accelerated pace of urbanization and industrialization, Shield construction technology has been widely used in railway tunnels, tunnel across the river, highways, tunnels and urban underground works. Full-face tunnel boring machine is a large underground construction equipment that assemble the mechanical, electrical, hydraulic, light, computer technology. It is the prerequisite for large-scale development and utilization of underground space. Segment erector is one of the core features of full-face boring machine, it has important impact on the entire underground construction. The segment erector’s performance is very important for segment erector.This subject relys on the "Eleventh Five-Year" national major scientific and technological projects - full-face boring machine project funding(2007BA09B01) and Shenyang North Heavy Industry Group(NHI). In this paper, it will research and analyse segment erector that based on 3.2m multi-function testing machine of Shenyang North Heavy Industry Group TBM State Key Laboratory. Optimiza the segment erector to make sure that it has the adjustment function with six degree of freedom. Then analyse kinematics, dynamics and hydraulic system about the improved segment erector to verify the performance of the new mechanism. It can provide a reliable design and improvement for following study. In this paper, the main results of research as follows:(1) Firstly, elaborate the research background of this project, then introduced the type, structure and working principle of segment erector. And expound the reserch status for segment erector in our nation and on abroad about segment erector.(2) Because of the testing machine has shortcomings that it can’t fine-tuning with six degrees of freedom. So we have to improve mechanism of segment erector to make sure that it can fit the requirement of six degrees of freedom. Then according to the data of the improved testing machine, using of three-dimensional modeling software-SolidWorks to creat part modelings and assembly modelings. Then establish the virtual prototype of testing machine.(3) Then analysis kinematics and dynamics about the improved segment erector according to the hybrid robot kinematics and dynamics analysis principle. Use the theory of series and parallel robot kinematics, and build the kinematics model of segment erector, and solving mechanism Jacobian matrix. On the basis of kinetic equation of Newton-Euler and Lagrange equations, dynamics model will be established.(4) According to requirements of shield segment erector. Establish the model of the hydraulic system of the experimental prototype. Then simulate the model with Simulink and SimHydraulics. Verify the stability of the hydraulic system.(5) Import the three-dimensional assembly of experimental prototype to Matlab software. Then simulate the improved segment erector with Simulink and SimMechanics to study the driving force, velocity, displacement and working load of mechanism.(6) Establish the co-simulation model of the entire mechanism’s system. Simulate the model and improve the mechanism and hydraulic system according to the result.(7) Static analysis of the erector to ensure the rigidity and strength of the assembled machine.