| 摘要 |
PURPOSE: A manhole capable of strong combination state maintenance and convenient branch pipe installation is provided to resist the load of soil applied to a branch pipe. CONSTITUTION: A manhole capable of strong combination state maintenance comprises a GRP manhole body(10), top and bottom slabs(20,20'), a branch hole(12), an inner join pipe(30), an external coupling pipe(40) and a connection unit(50). The GRP manhole body is made of synthetic resin and glass fiber. The branch hole is formed in the sidewall of the manhole body. The inner join pipe is attached to the inner wall of the manhole body which contacts the branch hole. The external coupling pipe is attached to the exterior wall of the manhole body. |
