MANHOLE IN WHICH A HOLDING PROJECTION OF A RISER PIPE IS CAUGHT ON A PROJECTION OF A RISER PIPE CONNECTION PART

摘要

PURPOSE: A manhole is provided to facilitate the manufacture of an invert and a riser pipe by tolerating inaccuracy in the dimensions of an invert and a riser pipe.;CONSTITUTION: A manhole comprises a riser pipe(2), an inlet pipe(21), a projection(13), and a holding projection(22). The riser pipe is connected to a riser pipe connection part(12) of an invert(1). The inlet pipe is installed on a side of the riser pipe. The projection is protruded outward on the top of the riser pipe connection part. The holding projection is installed on the bottom of the riser pipe and caught on the projection of the riser pipe connection part.;COPYRIGHT KIPO 2011