| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drainage system for underground structure in which standing water in the underground structure can be drained stably with simple configuration. <P>SOLUTION: A drainage system 1 for an underground structure 100 is configured to drain standing water in the underground structure 100 to the outside of the underground structure. The drainage system 1 comprises a lateral pipe section 10 which is fitted into a through hole 100b bored on a side wall 100a of the underground structure 100, and disposed laterally while turning an outer open end portion 10a toward the outside of the underground structure 100, a longitudinal pipe section 11 which is continued with the lateral pipe section 10 in an internal communication state and disposed longitudinally while turning a lower open end portion 11a toward the lower side of the underground structure 100, and a check valve mechanism 2 which is provided in the lower open end portion 11a of the longitudinal pipe section 11, closes the lower open end portion 11a and opens the lower open end portion 11a when a water level of the standing water in the underground structure 100 rises. <P>COPYRIGHT: (C)2013,JPO&INPIT |
