METHOD AND DEVICE FOR PROVIDING PIPE JOINT IN CONCRETE WALL

摘要

The publication relates to a method and a side core for fabricating a joint for a pipe extending through a concrete wall or concrete structure, such as for example a lower section (10) of a branching chamber, where prior to the concreting a side core (22) is established, the side core (22) being given an external shape adapted to the form to be established at least one joint in an aperture extending through a concrete wall or structure, and where the side core (22) for said joint being positioned at the required place between an outer formwork and an inner formwork for subsequent concreting, whereupon the side core (22) is removed upon completed concreting. The side core (22) for the joint comprises: - a first shape providing element (16) with a cross section that is configured such that the lower part of the cross section has a shape substantially adapted to a lower part of a downstream adjoining channel or duct (12',12''), so that an internally, at least a lower hydro dynamical surface is provided between an internal surface of a spigot end of an adjoining pipe and a consecutive downstream surface; - a second shape forming element (23) with an outer cross section which mainly is configured to in such way that the outer cross section is slightly larger than the outer diameter of a spigot end of a pipe (11,13) to be jointed in the joint in the concrete wall or structure, and - a mainly cylindrically shaped, form stable body (24) configured to form an aperture through the concrete wall or structure and preferably having an outer shape that is configured in such way that one or more contact areas are established for fixing of a sealing ring within the aperture for establishing a sealing fixation and/or joint between the surrounding concrete wall and the spigot end of the pipe (11,13) to be jointed, where at least said first and second shape providing body (16,23) are removed subsequent to completed concreting.