DOUBLE TUBE JOINT FOR PENETRATION OF BASE, DUCT LINE CONSTRUCTION METHOD AND DUCT LINE RENEWAL METHOD

摘要

SOLUTION: A double tube joint 10 for penetration of base is a joint for constructing a discharging pipe penetrating a foundation of building. The joint comprises an inner tube 12 and a sheath tube 14. The inner tube comprises an elbow part 20 curved in a prescribed angle and a lateral tube part 22 having a larger axial length than a thickness of a rising part of the foundation. In addition, the sheath tube comprises a lateral opening part 30 opened in a lateral direction, a curved part 32 curved upwardly from a base end part of the lateral opening part, and an upper opening part 34 opened upwardly and having such a size enabling the inner tube to be pulled or inserted.EFFECT: To have a superior construction characteristic and facilitate renewal of a discharging tube since all the connection works for the discharging tube are also facilitated.SELECTED DRAWING: Figure 1