| 摘要 |
<p>PROBLEM TO BE SOLVED: To cut and dislodge a buried pipe smoothly. SOLUTION: At the time of demolishing and dislodging an underground buried pipe 1, an earth pressure holding cylinder 4 is intruded into an outer peripheral part of the buried pipe 1 from a shield frame arranged on an edge part of the buried pipe 1, a cutting groove is formed along an overall periphery by leaving specified thickness on the outer peripheral part from the inside of the buried pipe 1 and the buried pipe 1 is sheared and separated in a ring shape by pressing a wedge member 9 on the cutting groove by a shearing a separating device 10 from the inside of the buried pipe 1. The separated buried pipe is slipped by its dead load at the time of cutting it at one time, and a cutting tool is never caught in it.</p> |
