FLEXIBLE BURIED TUBE

PURPOSE: To impart sufficient flexibility necessary for an alternation of the ground by forming the cross section of one direction as a corrugated shape and the cross section of the other direction as a straight pipe shape, and gradually decreasing heights of a recess part and projecting part of the corrugated cross section to the other directional cross section. CONSTITUTION: A pipe 1A of a synthetic resin or the like has two diametrical directional cross sections crossing at right angles including a pipe axis X-X. A cross section of one direction (Y-Y) is formed as a corrugated shape 2 and the cross section of the other direction crossing at right angles against the cross section of one direction is formed as a straight pipe shape 3. Recess and projecting parts (h) of the corrugated cross section of the corrugated shape 2 is gradually decreased against the cross section of the other direction. An embeded pipe 1 forms only the upper and lower side of an outer circumference as corrugated shape, a socket 1B and an inserting inlet 1C are formed at a pipe end. As the result, the embeded pipe only adjusts to a subsiding direction of the ground and fully opposes against a sideward pressure to obtain a straight line of a flat face condition of a pipe passage.