Stretching addition construction method null

摘要

PURPOSE:To cut and remove the cutting-planned section of an in-station wall easily together with a reinforcement on the inside by installing a cable drive in a front path space in the cutting-planned section and passing a cable for cutting between specified holes in an endless manner and driving the cable. CONSTITUTION:A self-advancing car 4 is fitted movably to a rack 3 on supports 2, 2a on the front of an in-station wall 1 as an object to be cut in the axial direction. A cable B for cutting, to which carbide-tipped beads are attached, is stretched from the cutting prearranged section (a) to one (b) in the in-station wall 1 so as to pass between the holes (a), (b), and passed on a driving wheel 5 in an endless manner through a plurality of guide pulleys. A driving-wheel rolling mechanism 6 is operated, the cable B is made to travel so as to be circulated at fixed speed while the cable is energized backward by the rotary driving of a pinion 7 and the movement of the self-advancing car 4 with the rotary driving, thus completely cutting a section from the cutting-planned sections (a) to (b) together with reinforcements on the inside.