| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a novel press-in device of a casing for burying a drain pipe based on that first press-in of a casing in a cylinder in a foundation at a prestage of burying the drain pipe and press-in of a drain pipe after that are devised, and capable of easily pressing the casing in a hard layer before the drain pipe is buried, and a method for constructing the drain pipe using the device.SOLUTION: A press-in device of a casing is suspended via a linear body 3 by a linear movable body 10 which repeatedly moves like a straight line by drive of a driving device 8, comprises a knocker 4 constituted by arranging a weight 33 inside, being inserted into a cylindrically molded casing 100, and having a tip cone 34 exposed from the tip of the casing 100 to the outside attached at a bottom edge, and is constituted by forming an engaging part 34 which engages with the casing in an underground direction and does not engage in a ground direction in the outer periphery of a middle part of the tip cone 34.</p> |
