| 摘要 |
A safety diagnosis system for checking the subsidence of a manhole for a water supply and drainage pipe is provided to check the subsidence of a manhole precisely and to prevent a manhole from subsiding more than the appointed level by installing on the lower part of a manhole in the earth. A safety diagnosis system for checking the subsidence of a manhole for a water supply and drainage pipe comprises a bottom support operating frame(10) located in the earth and fitted with a crisscross support(20), a crisscross support fitted with a diagnosis manhole(40), subsidence preventers(30,30a,30b,30c) preventing the subsidence of the bottom support operating frame, and a diagnosis manhole checking the subsidence of a crisscross support visually. |
