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Nov 22, 2004 The basic difference from the sealing processes based on acrylic resin mentioned above is in the more difficult handling of the polyurethane, which has the higher adhesive strength and greater strength in the end condition. This requires special packers with packer sleeves that have a greater ability to separate from the hardened polyurethane resin and that expel the injection medium completely out of the injection chamber. Representatives of this … |
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Nov 22, 2004 (Image: Sealing a pipe joint with the AMK or the RIM process with reference to [FI-AMK] [Image: S&P GmbH]) A representative of this is Amkrete Resin Injection Process, well know since its development in 1983 in England under the original "AMK" designation [FI-AMK] [NN86f]. It is used for sealing and/or fixing of leaks, longitudinal and lateral cracks, pipe breaks and cavities in the embedment in sewers DN 100 to DN 500 and materials of concrete, vitrified … |
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Injection from Inside with Non-Man-Accessible Cross Sections In the injection of pipe joints, also called socket injection, there are mostly used injection media based on acrylate resin, polyurethane and epoxy resin (Abschnitt 5.2.2.1). These media require different packer systems and mixing techniques for the respective components used. Generally a difference can be made between:
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Injection from Inside with Non-Man-Accessible Cross Sections (Image: Long packer of the Posatryn process [WRC90]) The object of injection into the pipe shaft or the section of the sewer region is the renewal of the leaktightness and the static bearing strength of damaged pipes or sectors of the section of the sewer also including the embedment. Long packers (Bild 5.2.2.4.2) with an injection medium based on acrylic resin are used for sealing injection. For restoring the leaktightness and the static bearing strength, … |
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Feb 16, 2011 Long packers with two inflatable packer sleeves connected together with a flexible intermediate piece are used for injection in the region of laterals (Bild 5.2.2.4.3.1) (Bild 5.2.2.4.3.1). The introduction of the packers can take place with winches or with the use of a pneumatically driven, self-advancing pulling installation [Steke84] attached to the point of the packer. The removal of the long packer can present difficulties with large annular spaces … |
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Feb 16, 2011 The simplest method for also sealing the connection of the lateral in one working pass is with the use of normal or long packers in the sewer immediately in the region of the connection together with a blocking balloon in the lateral. With this process, the injection medium is pressed into the whole of the blocked region and thus reaches into the leak and also into the soil. After the completion of the injection work, the gelled injection medium … |
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Nov 22, 2004 Injection processes based on polyurethane [FI-Janße] or cement as a binder [FI-Strobb] are used especially in the rehabilitation of nozzles or the connection regions of main sewer/private property connections. Special packers are used in both cases (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) (Bild 5.2.2.4.3.3) and these are positioned in the … |
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Injection from Inside with Non-Man-Accessible Cross Sections The further development of TV cameras to those with very small dimensions (Abschnitt 4.3.2.1) makes it possible today to position packers in laterals of DN 100 to DN 150. As regards the packers used, it depends on the locality of the application:
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Feb 16, 2011 These processes, according to the information of the manufacturers, are applicable for sealing leaking and/or cracked sewers or pipe joints, laterals and manholes and also part pipe breaks, whereby in this case the stability must still be ensured. In the regions of the leaks and depending on the ability of the injection medium to penetrate, the embedment is also sealed and fixed. The processes can all be used with the materials usual in the sewage … |
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Feb 16, 2011 After taking the section of the sewer to be worked on as well as its associated laterals out of operation and arranging the required by-pass flow, flushing with high pressure flushing apparatus is carried out as dirt can influence the chemical reaction of the two components under certain circumstances. |
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Feb 16, 2011 Sealing is carried out in two working steps. In the first, the affected section of the sewer is filled with the solvent A from the manhole and, depending on the local conditions, a pressure of 0.1 - 0.4 bar is applied (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2) (Bild 5.2.2.4.4.2.2). In this way, the solvent forces its way into the leaks or, through … |
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Feb 16, 2011 The tailings of the solvent B left in the section of the sewer are neutralised with a diluted solution A. This work is, of necessity, coupled with a leaktightness test in order to prove the success of the injection. The closed-off section of the sewer can then be immediately put into operation again. In the Sanipor process, the sewer is cleaned with water and the tailings of the gel are removed. This is possible as the gel only reaches its final hardness … |
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Nov 22, 2004 |
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Feb 16, 2011 The personnel requirements for carrying out the fill and drain system are 3 to 5 people. Besides the equipment required for the cleaning and inspection, sufficient sealing balloons are also required as well as 2 to 4 tanker vehicles with integrated or separate pumps and suction installations as well as a container with tools and testing equipment. |
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Feb 16, 2011 The advantages that can be named are:
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Injection from Inside with Non-Man-Accessible Cross Sections Fill and drain system, also called flood grouting or line injection, are characterised by a two-phase injection using the section of the sewer as a conveying or distribution pipe for the injection medium and the leaks as injection openings. The required injection pressure is created by means of backing up the affected section of the sewer or the network region. Some representatives of this group of processes, in alphabetic order are:
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Nov 22, 2004 The injection processes utilised in the non-man-accessible region serve the purpose of
In contrast to the internal injection with man-accessible cross sections, in which all works can be carried out manually at the site under direct control, the injection in the non-man-accessible region (with the exception of the fill and drain … |
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By injection (insertion) there will be understood in the following, under the influence of DIN 4093 [DIN4093], the introduction of injection media (insertion substance to DIN 4093 [DIN4093] or filling substances to ZTV-Riss 93 [Verkehra]) into cracks and cavities under pressure by means of filler nozzles. Cavity is the covering term for natural and artificial cavity structures of all kinds:
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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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Nov 22, 2004 Surface moisture in manholes or other structures of drain and sewer systems or in man-accessible sewers of concrete or reinforced concrete can also be sealed by means of surface treatment with the use of various media. A fluid silification preparation is often used for sealing against water that is not under pressure. According to [AGIK10], silification is understood to be "A solidification of mineral structural materials by means of soaking with silicic … |
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Sealing of Joints and Pipe Joints with the Aid of Sealing Materials
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Sealing of Joints and Pipe Joints with the Aid of Sealing Materials Plastics sealing media to DIN 4062 [DIN4062:1978], hereafter called sealing materials, are materials that remain constantly plastic, that contain bitumen, coal tar pitch, plastics or mixtures thereof as binding material and that can be worked at 20° C without the use of a heat source. They consist of un-polymerised materials that are inserted into the joint by means of a pouring process. Increasingly used today, in addition to the sealing materials, … |
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Feb 16, 2011 Rehabilitation and Maintenance of Drains and Sewers Sealing of Joints and Pipe Joints with the Aid of Sealing Materials
Depending on the behaviour from the plastic to the mechanical portions, the sealing materials and joint sealing masses can be designated as plastic, plasto-elastic, elasto-plastic or elastic (Bild 5.2.3.2.2.3). This behaviour is derived from the deflection … |
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