| 摘要 |
PURPOSE: A prefabricated manhole structure is provided to simply construct a manhole using an O-ring and to prevent a water leak during construction. CONSTITUTION: A prefabricated manhole structure comprises a base plate(1) and a pipe body(2). O-ring grooves(10) are formed in the mounting parts of the base plate and the bottom of the mounting parts(2a) of the pipe body. Coupling board(20) with hanging units(21) are coupled to the outer surface of the bottom of the pipe body. The hanging units are coupled to the inner walls of the mounting parts using O-rings(40). |
