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Jun 02, 2004 (Image: Creation of the core bore by means of a core drilling machine rectangular and central to the axis of the sewer [FI-DS]) When connecting a lateral which has been laid in a line trench or by the trenchless method of construction by employing the open-cut method the section concerned of the sewer has to be excavated and secured by observing EN 1610 [DINEN1610:1997] [DINEN1610-1:1997], ATV-DVWKA 139E [ATVA139a] and DIN 4124 [DIN4124:2002]. Since … |
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Feb 16, 2011 In this rehabilitation measure, neither the manhole tops, nor the surrounding covering and carrier layers, are removed. There follows only the lifting or lowering of the frame that has previously been loosened with the aid of special mechanical or hydraulic machines (Bild 5.2.1.1.1) (Bild 5.2.1.1.1) (Bild 5.2.1.1.1) (Bild 5.2.1.1.1) [WPCFFD6] [NASSCO85a] [WPCF85].
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Feb 16, 2011
The height levelling of manhole tops with removal is always carried out when the surrounding cover layer is also damaged by the formation of cracks, deformation, etc. (Bild 5.2.1.1). As a rule, the repair is carried out by the removal of the surrounding covering and carrier layers as well as the damaged manhole top including possibly the supporting ring, if there is one, then the installing it again at the desired level. Subsequently, the surrounding … |
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Feb 16, 2011 An important point in the repair of manholes is the replacement of corroded or broken climbing rungs (climbing irons, safety steps or ladders) (Abschnitt 1.8). When installing, the installation instructions must be adhered to. It must be ensured that material, shape and step heights per manhole are the same (see ATV-A 137 [ATVA137]) and that the condition of the manhole wall is such that the exchange is permissible from a statics point of view. The … |
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Feb 16, 2011 Because the structures of drain and sewer systems, and especially the manholes, are mostly constructed of concrete, reinforced concrete or brickwork, the following will deal exclusively with the local restoration of missing portions of these materials. Such defective areas that can occur in the manhole walls, joints, connection regions, as well as in the benching and the channels, are, for instance:
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An important share of the repairs to manholes is the regulating and exchange of manhole tops because today, as compared to earlier, much greater demands are made on the evenness of the traffic lane and these are subject to higher loads due to the heavier traffic … |
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Repair measures to sewers from the outside involve especially the replacement of single or several damaged pipes. In this case, after placing the section of the sewer out of action, the defective pipe region is exposed using the open cut method (Bild 5.2.1.2), a closer pipe piece with smooth ends is inserted and the new pipe joint is remade with the aid of sleeve joints (Bild 5.2.1.2) (Bild 5.2.1.2) [FI-Naylo] [FI-Stein93].
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Nov 22, 2004 For some years the shrink hoses to DIN 30672 [DIN30672-1:1991], also called shrink sleeves [Opitz85], that have proven themselves in the gas and water sectors have also been used in the sewage sectors for sealing pipe joints up to DN 1200 [FI-Raych]. Shrink hoses consist of jet soaked polyethylene with an inner coating of thermoplastic sealing adhesive. Jet soaked plastics, especially when they are specially mixed with stabilisers, possess the following … |
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Nov 22, 2004 (Image: 3-Part sleeve for external sealing - TS 30 [FI-Städt]) For external sealing of locally limited leaks, e.g. lateral cracks, limited pipe breaks, leaking pipe joints (felt connections) also combined with lateral deviations of limited extent in the horizontal and vertical direction, there are available multi-part sleeves of stainless steel with an inner elastomer coating (Bild 5.2.3.1.2). With this type of sleeve, seals to pipes with circular … |
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Jan 01, 1900 The lecture series "Repair of manholes made of concrete, reinforced concrete and masonry" presents several possibilities for repairing manholes. The fourth part of the series is about rehabilitation of cracks in manholes by means of injection. The aim of the lecture is to provide an overview of implementation of such measures. |
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Nov 22, 2006 Manholes perform a variety of functions, they are used to connect pipelines, to change direction and/or elevation, to provide access for personnel and/or equipment, and to provide aeration and ventilation to the drain and sewer system. This module covers crack repair in manholes using injection. After completing this module, you will have a sound knowledge of:
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Jan 01, 1900 The lecture series "Repair of manholes made of concrete, reinforced concrete and masonry" presents several possibilities for repairing manholes. The third part of the series is about height levelling and replacement of manhole tops. The aim of the lecture is to provide an overview of implementation of such measures. |
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