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    • 9. 发明专利
    • DRAIN PIPE AND DEWATERING METHOD OF SOFT GROUND
    • JPH10159078A
    • 1998-06-16
    • JP33277296
    • 1996-11-27
    • ASANUMA GUMI KK
    • ASADA TAKESHIMIZOGUCHI YOSHIHIRO
    • E02D3/10
    • PROBLEM TO BE SOLVED: To improve a water collection capacity in underground by providing a plurality of conical projections communicating with the inside of a drain pipe body on the outer wall of the peripheral wall of the drain pipe body. SOLUTION: A plurality of water flowing holes 1b are penetrated on the peripheral wall 1a to constitute a pipe body with a hole 1. In order to enlarge a water collection area, a plurality of conical projections 2 are protruded on the outer wall of the peripheral face 1a, and a through hole 2a communicating with the inside of the pipe body with the hole 1 is penetrated in the projections 2. Next, when a drain pipe with a projection D is placed in the soft ground, underground water is collected from the water passing hole 1b to the inside of the pipe, and the underground water is collected from the water passing hole 2a penetrated in the projection 2. Furthermore, since the projection 2 is buried in the ground at the time of placing of the drain pipe D, the ground is compacted only by a buried part, and floating of the drain pipe D can be prevented.