BS EN 14830:2006 – Thermoplastics inspection chamber and manhole bases — Test methods for buckling resistance
1 Scope
This European Standard specifies methods of test for the resistance of the base of thermoplastics inspection chambers and manholes to external soil and ground-water pressure after installation. NOTE This is intended as a test of the durability and structural integrity of manhole and inspection chamber bases supporting product standards prEN 1 3598-2 [1 ] and prEN 1 5229 [2].
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ENV 1 046:2001 , Plastics piping and ducting systems Systems outside building structures for the conveyance of water or sewage Practices for installation above and below ground EN ISO 9967:1 995, Thermoplastics pipes Determination of creep ratio (ISO 9967:1994)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 inspection chamber drainage or sewerage fitting used for the to connection of drainage or sewerage installations and/or for changing the direction of drainage or sewerage runs. An inspection chamber terminates at ground level, permitting the introduction of cleaning, inspection and test equipment and the removal of debris but it does not provide access for personnel. The riser shaft connected to these fittings has a minimum outer diameter of 200 mm and a maximum inside diameter of less than 800 mm (see also EN 476:1 997 [3] for non circular chambers) NOTE The termination at ground level permits the introduction of cleaning, inspection and test equipment and the removal of debris but does not provide access for personnel.
3.2 manhole drainage or sewerage fitting used for the connection of drainage or sewerage installations and/or for changing the direction of drainage or sewerage runs. A manhole terminates at ground level, permitting the introduction of cleaning, inspection and test equipment and the removal of debris and also providing access for personnel. The minimum inside diameter of a manhole riser shaft is 800 mm (see also EN 476:1 997 [3] for non circular manholes)
NOTE The termination at ground level permits the introduction of cleaning, inspection and test equipment and the removal of debris and provides access for personnel.
4 Principle
A sealed test assembly comprising an inspection chamber or manhole base with a minimum height of 300 mm above the top of the main channel, is placed free standing, or buried in a test box on a 1 00 mm sand or granular bed and covered with granular backfill to a level of minimum 300 mm above the top of the outlets and inlets of the main channel(s). In some cases the first section of the riser may be required in order to achieve the minimum height of 300 mm.
BS EN 14830:2006 – Thermoplastics inspection chamber and manhole bases — Test methods for buckling resistance