Prefabricated cement tubes for producing pipes

摘要

The invention relates to prefabricated cement tubes each having a cylindrical shape and intended to be abutted for producing pipes. These tubes are noteworthy in that the external circular periphery 1b of the cylinder 1 forming each tube comprises a flat portion 2b providing the said cylinder with better seating on the foundation bedding intended to receive it. Application to the production of tunnels for the supply or evacuation of water and to the construction of pedestrian passageways. <IMAGE>