CASING CONNECTION DEVICE FOR CAST-IN PLACE CONCRETE PILE, CAPABLE OF EFFECTIVELY EXTENDING LENGTH OF CASING

摘要

PURPOSE: A casing connection device for a cast-in place concrete pile is provided to easily connect casings in the field and to efficiently extend the length of the casings. CONSTITUTION: A casing connection device(100) for a cast-in place concrete pile comprises upper connection parts(10), lower connection parts(20), side keys(50), and center keys(40). In the upper connection part, a steel plate is welded to the inner lowermost end of an upper casing(C1) in the circumferential direction. The lower connection part is connected to the upper connection part in an overlapped state. In the lower connection part, a steel plate is welded to the inner uppermost end of a lower casing(C2) in the circumferential direction. The side keys are inserted in the bodies of the upper and lower connection parts along the circumferential direction of the upper and lower connection parts. In the side key, a vertical part and a horizontal part are integrally bent at a right angle. The center key is inserted in a groove formed between the vertical parts of the side keys inserted in the bodies of the upper and lower connection parts. The center key is made of a ferromagnetic material and formed in a right hexahedral shape.