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Nov 23, 2004 PVC-U rib plates, also known as BKU invert channels, e.g. in the form of semi-circular or third-circle channels (DN 250 to DN 1000) or ovoid profile channels (600/900 to 1600/2400) are used for lining inverts as well as for later installation of a channel for dry-weather flow (Tabelle 5.3.2.5.1.4.1) [DINENISO527]. (Table: Dimensions of invert semi-circular channels of PVC-U rib plates (BKU semi-circular channels) [FI-Fried]) As a rule, the channels … |
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Nov 23, 2004 (Image: Invert plates of HD-PE - Spiralbauku system [FI-Bauku]) Spiral-bauku channels of HD-PE are fabricated in the sizes DN 400 to DN 1000 and lengths up to 6 m. They can be installed in an analogous manner to the BKU invert channels. The connections of the elements can be a butt joint or with socket and spigot (Bild 5.3.2.5.1.4.2). |
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Nov 23, 2004 GRP semi-circular channels for later lining of the invert are cut from pre-fabricated pipes [Bloom88]. Stainless steel clamps are utilised for mutual positioning and these remain when the GRP semi-circular channels are backfilled. Abutments and transfers to the sewer walling are laminated with polyester resin. |
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Nov 23, 2004 (Image: Stud sheet with cross studs [Kölke96]) Invert linings made of concrete protective plates or stud plates are manufactured from HD-PE, PP and PVFD materials with thicknesses of 1.5 to 15 mm [Kölke96] [Neuwa91]. Depending on manufacturer, they possess anchor, round or cross studs (Bild 5.3.2.5.1.4.4) on the back (Abschnitt 5.3.2.4.2). When installing, the plates are usually pushed up against each other and extrusion welded. Overlapping joints … |
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Nov 23, 2004 The lining of the invert in the WH system is carried out with the aid of plastics coated steel elements with a semi-circular profile from DN 500. The coating of the elements consists of a two-component reaction resin based on polyurethane. The segment abutments can be pointed up with a permanently elastic trowelling mass based on the same material. According to the manufacturer's information, the lining satisfies the requirements of the building … |
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Nov 23, 2004 Rehabilitation and Maintenance of Drains and Sewers Lining by Means of Installed Individual Elements (Segmental Lining Process) The main reasons for invert segmental lining can be:
The following materials and systems are preferred for these rehabilitation measures:
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Nov 23, 2004
The plastics used for these linings are:
In addition, there are … |
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Nov 23, 2004 Rehabilitation and Maintenance of Drains and Sewers Plates and Strips of Plastics with Integrated Anchoring Elements (Image: Lining the gas space with PVC ribbed foil - Dimensions of the PVC ribbed foil, Trocal system (Dynamit Nobel AG)) The first developments and tests of PVC foils occurred in the 40's of the 20th Century in the USA. There they are known under the trade name T-Lock-Amer-Plates [FI-Amero]. Comparable products have been available in the Federal Republic of Germany since the middle of the 70's, e.g. under the designation Trocal-Dichtungsbahn Typ KST [… |
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Feb 16, 2011 Rehabilitation and Maintenance of Drains and Sewers Plates and Strips of Plastics with Integrated Anchoring Elements PVC-U Rib plates of the BKU system with the certification number Z-1.42.1 of the Deutschen Institutes für Bautechnik (German Institute of Construction Technology), Berlin are 314 mm wide and can be manufactured in any required length (Bild 5.3.2.5.2.2.2) (Bild 5.3.2.5.2.2.2) [FI-Fried].
A gas and watertight connection of the individual profiles to each other is … |
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Nov 23, 2004 Rehabilitation and Maintenance of Drains and Sewers Plates and Strips of Plastics with Integrated Anchoring Elements (Image: HD-PE rib plates: BKU II plug profile shapes [FI-Fried]) An alternative to lining with PVC rib plates is also offered by HD-PE rib plates under the designation "BKU II-Stecksystem" (BKU II-plug system) [FI-Fried] and "SLT-Platte T-Grip" [FI-SLT]. The BKU II-Stecksystem is delivered in standard lengths of 3.0 and 5.0 m (special lengths are possible) with a width of 1 m. The most important features of this system are the lining rib profiles, … |
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Feb 16, 2011 Rehabilitation and Maintenance of Drains and Sewers Plates and Strips of Plastics with Integrated Anchoring Elements In the "Polygrip System", PP or HD-PE plates in widths up to 10 m long, depending on the project, and in wall thicknesses from 2 to 30 mm (usually 2 to 8 mm) are manufactured and provided in the factory with brush-type strips, the so-called Polygrips. These consist of approx. 6 to 7 mm wide woven strips into which long mono-filaments (elongated polyethylene threads up to 10 mm) are woven (Bild 5.3.2.5.2.2.4). For normal applications a mutual spacing … |
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Nov 23, 2004 For lining with plates and strips of plastics with integrated anchoring elements, their mechanical anchoring, e.g. via ribs with a T-profile, studs or so-called "Polygrips", is achieved in a carrier cross section specially manufactured and dimensioned for this case in the form of the annular space grouting. The systems utilised for this can be, for instance:
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Feb 16, 2011 Besides the pure BKU profile, prefabricated connecting elements of BKU profiles and glass fibre concrete are also used for rehabilitation purposes [FI-Fried]. These elements are supplied as curved segments, formed in-situ to a partial segmental lining and mounted to the pipe wall (Bild 5.3.2.5.2.3). Spacers are placed in order to achieve an annular space.
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Feb 16, 2011 The Dunlop Planks process developed in Great Britain and patented in 1985 (UK patent No. 2094860B) belongs to the group of linings with hollow insertion profiles [WRC90]. Carrier profiles that serve at the same time as spacers to the existing sewer walls and hollow profiles of PVC, PP or HD-PE in 6 m lengths are alternatively distributed about the circumference of the wall (Bild 5.3.2.5.2.4) (Bild 5.3.2.5.2.4) (Bild 5.3.2.5.2.4) (Bild 5.3.2.5.2.4)… |
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Nov 23, 2004 An expensive method is presented by lining with stainless steel (V4-A) sheets with corrugations. In an application in the Free and Hanseatic City of Hamburg, the 1 mm thick plates were welded onto flat strips and anchored with wall plugs and screws in the concrete [Maidl82]. |
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Nov 23, 2004 Rehabilitation and Maintenance of Drains and Sewers Lining by Means of Installed Individual Elements (Segmental Lining Process) The later segmental lining of the gas space serves the purpose of restoring or enhancing the resistance of the sewers especially against biogenic sulphuric acid corrosion (Abschnitt 2.6.3.2). It is normal to line 260° to 320°. The feet of the elements lie below the water level for dry weather flow so that the ingress of air behind the lining is prevented. The lining systems in use are:
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Feb 16, 2011 The lining of sewers of any cross sectional shape with reinforced gunite concrete elements (Bild 5.3.2.5.3.1) was developed in Great Britain [FI-Rees]. They are made outside the sewer with a minimum wall thickness of 40 mm on a corresponding shuttering (Bild 5.3.2.5.3.1), moved to the sewer and positioned there (Bild 5.3.2.5.3.1) (Bild 5.3.2.5.3.1).
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Feb 16, 2011 Fibre concrete elements are manufactured from cement and fine sand in a proportion of 3:1 as well as 5 % weight alkali-resistant glass fibres of between 10 and 25 mm length in a gunite process. The element length is generally 1.2 m long but can be adapted to any situation. The connection of the elements to each other is carried out by a felt and/or socket connection (Bild 5.3.2.5.3.2), which is additionally secured by means of screws in order to prevent … |
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Feb 16, 2011 The elements of reaction resin differ from the elements of gunite and glass fibre concrete only as regards the binding medium. They consist of a mixture of polyester resin (10 - 20 % weight) and quartz aggregates. If required, glass fibres can also be added. The relative thick (approx. 38 mm) and stiff elements do not require supporting measures during the grouting of the annular space [FI-Quili]. In order to prevent the exit of the grouting material, … |
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Feb 16, 2011 One representative of this process group is the Channeline process developed in Great Britain and used in Germany since 1992 (Bild 5.3.2.5.3.4) (Bild 5.3.2.5.3.4) (Bild 5.3.2.5.3.4).
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Feb 16, 2011 (Image: Complete segmental lining with elements of special glass - Glass elements installed and fixed with hydraulic hoses [FI-Flach]) The TRANSPLUS Glasauskleidungssytem (TRANSPLUS glasslining system) [FI-Flach] developed in the Federal Republic of Germany is a member of this group. In this system, lining elements of chemically resistant, high strength and impact resistant special glass are installed for complete segmental lining of ponds and sewers … |
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Nov 23, 2004 Rehabilitation and Maintenance of Drains and Sewers Lining by Means of Installed Individual Elements (Segmental Lining Process) (Image: Complete segmental lining with PVC rib foil - position of the relief groove with radial rib arrangement [FI-Fried]) In a complete segmental lining, the complete internal circumference of the pipe in the section of the sewer to be rehabilitated is provided with a lining. Besides the division into with/without annular space, a further division can be made into:
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(Image: Overview of the lining processes with individual elements) In the segmental lining process, individual, self-supporting or non-self-supporting lining elements are brought, via existing manholes, openings or excavations, into man-accessible sewers and structures of the drain and sewer systens of any desired cross-sectional shape and installed in-situ either manually and/or with the aid of suitable apparatus and fixing elements (Bild 5.3.2) … |
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(Image: Distribution of the lining processes) The lining processes (continuous pipe, long pipe, short pipe, deformation, reduction, spirally wound pipe, cured-in-place pipe and grouted-in-place pipe processes) and the installation processes are dealt with below under the following process groups (Bild 5.3.2) :
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