| 摘要 |
The present invention relates to an anti-sinking manhole capable of preventing the manhole from rapidly sinking and a drainage pipe from being damaged by the support force of an anti-sinking pipe for covering a drainage pipe connected to the manhole when the manhole sank by the weight of the manhole after the manhole is completely installed. The anti-sinking manhole includes both lower sides with an inlet port (11) and an outlet port (12) which are connected to drainage pipes, and has a cover (13) engaged to an upper portion, wherein the inlet port (11) and the outlet port (12) protrude outwardly from the outer surface of the manhole. The manhole is spaced apart from the outer surface of the drainage pipe (30) at a given distance, and an anti-sinking pipe (20) has one end fixed to the inlet port (11) and the outlet port (12) and the other end extended to the outer surface of the drainage pipe and including an outer cover (21) for blocking the inflow of alien substances. |
