| 摘要 |
<p>PURPOSE:To provide an underground conduit free from uneven settlement due to a change with the lapse of time after the execution of a work, or free from floating, even upon occurrence of an abnormal flood under the conduit because of a vibration applied to a subsoil due to an earthquake or the like, regarding an underground conduit buried in a weak subsoil. CONSTITUTION:A hardenable foundation material 2 is buried around a pipe body 3 laid underground. Also, a plurality of gutters 4 and so forth are erected at both sides of the pipe body 3 along the lengthwise direction thereof. The upper end of each gutter 4 is made open to the ground surface and, then, backfilled from the upper side thereof. According to this constitution, even if an abnormal underground water flood takes place and gathers under a buried conduit, the flooding water is immediately discharged above via the gutters 4. The buried conduit is, therefore, almost free from an abnormal upward force.</p> |
