RESEARCH ON THE PERFORMANCE OF SHIELD TUNNELING MACHINE KNIFE DISC MUD CAKE AND MECHANICAL ARM CLIMBING TEST
Due to the long-term adhesion of mud cake, the working load of the shield machine cutterhead and cut-ting tools gradually increases, leading to sudden changes in excavation parameters and greatly reduces construction efficiency, and It is difficult to manually clean the mud cake of the shield tunneling machine. The paper analyzes the formation process and mechanism of mud cake prepared in the laboratory environment, and the physical properties of the mud cake are tested. The influence of bonding strength on the mechanical properties of mud cake is studied through micro cross plate shear apparatus, consolidation tests, and mechanical arm adhesion tests. The results show that the mud cake style exhibits moderate compressibility, and the initial bonding strength affects the shear dilation of the mud cake style during the shear process, which affects the shear strength of the mud cake. When the shear strength of the mud cake style is 85 kPa, the robotic arm reaches the surface of the mud cake area. Therefore, the in-crease in the number of claw tips and the improvement of the shear strength of the mud cake can effectively improve the climbing state of the robotic arm.
shield tunneling machine cutterhead mud cakerobot arm climbinginitial bonding strength
万方数据
维普
