Excavation hammer for core separate function having core barrel work

摘要

The present invention relates to an excavation hammer having a core separation function for a core barrel work which is used for an excavation work of a large caliber (1000 mm or more) on a bedrock layer by being combined with a pile drilling machine comprising: two or more core cutting elements having a hydraulic cylinder for cutting, which is installed in an axial perpendicular direction in a lower end of an installation portion, and a cutter which is pressed into a bedrock core by being exposed toward a core formation space when a rod is withdrawn by being combined with the rod of the hydraulic cylinder for cutting; and a pressurizing element having a hydraulic cylinder for pressurizing, which is installed in an axial perpendicular direction in an upper end of the installation portion, and a pressurizing groove which is tightly connected on a wall side of a case which is pressed along a wall side of an excavation hole or the excavation hole when a rod is withdrawn by being combined with the rod of the hydraulic cylinder for pressurizing.