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(Image: 386321 - Titelbild Dokumentation) Process: Lateral connection repair Title: Recovery of lateral connections DN 150 of a sewer DN 250 that was rehabilitated by CIPP using the DrainLCR system Location: Factory premises Limiting conditions:
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Description of the system With the DrainLCR-Liner system the region of the lateral connection is rehabilitated starting from the main sewer up to 300 mm (≈ 12 in.) into the lateral by using a hat-shaped connection sleeve. A packer with a lifting mechanism with compressed air cylinder, which is mounted onto its packer rod below the calibration hose, serves for positioning. Under integrated camera supervision, the LCR packer is pushed behind the connection … |
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First, a lateral that leads into the main sewer at an angle of 45° is connected. Preparation of the packer For preparation in a first working step form oil is applied onto the packer, which is equipped with a slightly erected and cleaned calibration hose. A guiding wire is fixed to the end of the balloon of the calibration hose. It is intended to ease the later application of the impregnated top-hat sleeve onto the packer.
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Installation of the top-hat sleeve During the installation of the packer, one member of staff is needed to operate the control unit and another one at the manhole to position the packer by means of the push rods. Important: When transporting the packer to the manhole, care must be taken of the fact that the calibration hose is not damaged. The packer is inserted into the sewer that is to be rehabilitated via the manhole. Before connecting the LCR packer … |
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Next a lateral, which leads into the main sewer at an angle of 90°, has to be connected. For this purpose, the calibration hose and the packer basket must be replaced. Demounting of the calibration hose In the first working step the connection clamps are removed from both ends of the packer, the LCR string of the pulling-in suite for the balloon of the calibration hose inside the packer is cut and the lid of the winding box is screwed open to remove … |
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Now, the lateral that leads into the main sewer at an angle of 90° is connected. The rehabilitation process is the same as the rehabilitation process with top-hat sleeves at a connection angle of 45°. It includes: Preparation of the packer
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Mar 22, 2011 Repairing the connection of DN 150 lateral sewers connected to a DN 250 sewer by means of cured-in-place top hat profile (DrainLCR system) (CIPP). |
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(Video: Schematic illustration of a grouting system consiting of a folding saddle and a packer)
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Nov 23, 2004 (Image: Top hat sleeve for the recreation of the branch connection) The restoration of the branch connections is carried out analogously to Abschnitt 5.3.2.2.1 and Abschnitt 5.3.2.4.1 by the open cut or trenchless methods. In the case under consideration, the trenchless method is available for sewers from DN 200 and laterals ≥ DN 100 with the utilisation, for instance, of a special top hat sleeve developed for the TROLINING® system (Abschnitt 5.2.3.2.3). … |
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Nov 22, 2004 Rehabilitation and Maintenance of Drains and Sewers Restoration of Concrete, Reinforced Concrete and Pre-stressed Concrete Sewers Concrete surfaces that are to be the foundation for a repair measure must always consist of undamaged concrete, i.e. they must be free from dirt, old paints that cannot carry loads, floury fine grout layers and all other substances that can reduce a bonding effects (e.g. damaging salts such as sulphates, nitrates). The concrete foundation must be prepared such that a tight and durable bond can be achieved between the repair grout to be applied and … |
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