Abstract
Shield tunnelling technology has been widely applied in various ground conditions to minimize the change and possible damage of an area in which a tunnel is intended to be constructed. Subsequently, Horizontal and Vertical shield (H&V shield) machine technology has been developed from common shield tunnelling method by connecting two ordinary articulated shields between left and right body. The H&V shield machine can rotate multi-circular tunnel shape continuously from horizontal direction to vertical one or vice versa under simultaneous construction of multiple tunnels. Consequently, H&V shield machine technology is precious for saving cost, reducing time and increasing construction performance at tunnelling. Simulation algorithms based on the shield kinematic model were utilized to simulate the shield tunnelling behaviour. This paper examines the influence of copy cutter length (CCL) on H&V shield behaviour by a sensitivity analysis. As a result, it was found that the copy cutter length has more effect to the shield behaviour, especially in velocity and pitching angle, because the increase of copy cutter length (CCL) reduces ground reaction force.
