| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems that reduction of noise and vibrations is limited and a work environment becomes inferior causing decline of work efficiency in a method using a concrete breaker or the like, and it becomes impossible to execute construction depending on a position of a buried object because of a work device in a method of cutting and removal using a wire saw, in the case of removal construction of a left columnar object comprising reinforced concrete. <P>SOLUTION: In a method of cutting and removing a left pile for earth retaining, a left columnar object upper part removal method by high pressure water includes: a boring step of boring a work hole from the upper end face; a high pressure water jetting step of inserting a high pressure water supply pipe to the work hole, jetting the high pressure water from a high pressure water jetting nozzle provided on the distal end thereof in an outer peripheral direction of a columnar object, and crushing a non-ferrous part of the left pile; a fusion cutting step of fusion-cutting the ferrous part of the left pile; and a removing step of taking out the cut-off upper part of the pile onto the ground. <P>COPYRIGHT: (C)2013,JPO&INPIT |
