| 摘要 |
A guide device for underground continuous wall construction and a bedrock excavation method using the same are provided to heighten excavation efficiency by crushing intensively bedrock located correspondingly to a bit of excavation equipment, and to maintain the perpendicularity of a bedrock excavation bit using a guide device and to crush a bedrock layer by operating a bedrock excavation bit perpendicularly. A bedrock excavation method using a guide device for underground continuous wall construction comprises the steps of installing a guide wall(4) and excavating a soil layer(2) inside the guide wall using excavation equipment(30), removing the excavation equipment to the outside of an excavation hole and installing a guide device(1) to the inside of the excavation hole, penetrating a bedrock excavation bit(40) to the inside of the guide device and crushing a bedrock layer(3), and after crushing the bedrock layer completely, removing the bedrock excavation bit and the guide device, placing the excavation equipment again to the excavation hole and excavating the crushed bedrock layer, thereby forming excavation holes in the soil layer and the bedrock layer continuously. The guide device for guiding the hitting location of a bedrock excavation bit, includes a guide plate and a steel pipe, wherein one or more insertion holes are formed in the guide plate to insert the steel pipe, and the steel pipe is inserted and fixed to each insertion hole of the guide plate and fitted with the bedrock excavation bit to hit and to crush the bedrock layer perpendicularly.
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