Construction manner and that device null of shaft or inclined shaft and main track

摘要

PURPOSE:To reduce a construction period by using a center-bent device to make steep curve execution after a vertical shaft is constructed by the seconds shield excavator into which the first shield excavator is incorporated, and branching and moving forward the first excavator to construct a main track tunnel. CONSTITUTION:The first and second shield excavators A and B are held on the same axis, and a cutter face plate 3 of the first shield excavator A and a copy cutter 4 are driven and rotated to excavate and construct a vertical shaft C from the ground. After that, when it is excavated and moved forward to a specific depth, a center-bent jack 8 of the second shield excavator B is operated, and the excavator B is bent at the center to make steep curve execution. The excavator A is branched and separated from the excavator B at a proper position by using a shield jack 1 by making a slide device 5 and guide roller 6 as a guide to move forward, and a horizontal main track tunnel is constructed. According to the constitution, the starting shaft is not required, and a construction cost can be reduced.