PROBLEM TO BE SOLVED: To provide the method comprising cutting-off the earthquake-proof slit to a required depth up to a maximum depth of 270 mm in an internal wall surface inside a box culvert, wherein instruments and materials are carried from a manhole with a diameter of 600 mm.;SOLUTION: The method for cutting-off the earthquake-proof slit of the box culvert internal surface comprises: adopting a deep-cutting type cutting-off machine 1, a feed guide 2 for a cutting machine 1, a slide guide 3, a rail self-propelled basis 5 and a guide rail 6 to guide a basis 5, as the instruments and the materials, and cutting-off the earthquake proof slit S by the cutting machine 1 which can be carried from a carrying port, wherein the deep-cutting type cutting-off machine has a type in which the drive wheel is brought into contact with an inner circumference of a ring-shaped cutting blade and the cutting blade 11 is fed in a rotational direction to drive, and the rail self-propelled basis has an angle adjustment guide 4 and comprises a traveling roller 51 and a driving device 52 thereof.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
展开▼
