| 摘要 |
The present invention relates to a direct-boring device including a boring unit with a bit boring the ground and integrally formed on the lower part; a front casing installed around the boring unit to be detached from the boring unit; a cartridge casing formed on the top of the front casing to be inserted when boring; a connecting rod integrally connected to the boring unit; and a driving device rotating the connecting rod. In addition, a direct-boring method using the driving device includes a soft ground boring step of inserting the front casing into a borehole formed by coupling the front casing to the boring unit and thereafter rotating the boring unit and inserting at least one cartridge casing into the rest upper space; a step of separating the front casing from the boring unit when the boring unit reaches a bedrock layer; and a bedrock boring step of forming a borehole in the lower side of the front casing by rotating the boring unit. |
