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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Nov 13, 2006 Repair of Concrete, Reinforced Concrete and Brick Manholes – Part 2: Climbing Aids, Defects, Joints
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Aug 01, 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. Like sewers and pipes, defective manholes need to be repaired. This module covers the repair of climbing aids, the repair of defects, the construction and materials of concrete repair systems and joint repair. After completion of this module, you will have a sound knowledge of:
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(Image: 55125 - Titelbild Dokumentation) Proess: Re-jointing corroded masonry joints, crack injection, repair of damaged laterals Title: Repair of masonry sewage collectors and manholes while retaining the original masonry by rehabilitation of the joints and crack injections. Location: Position in the road cross section of a German main road Limiting values:
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The rehabilitation of the masonry collectors is achieved by injection of the existing cracks and re-jointing the corroded masonry joints. With this method the corrosion protection of the collectors and their partly insufficient stability as shown by the calculations is again established. In order to determine the quality standards in the execution of the masonry rehabilitation as regards materials and procedures, three reference fields were carried … |
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Sewer cleaning Corroded or loose jointing material, blooms, bulges, foreign matter (e.g. greases or oils) growths, dust and other dirt are removed by means of high-pressure jets with a flushing pressure of maximum 150 bar. Removing loose jointing material The butt and bed joints in the region of the springing line are cleaned out up to a hard underground but not more than 5 cm deep due to the fact that the joint mortar can soften and parts of it can … |
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Re-jointing the previously cleaned-out joints Ground and cleaned joints are re-filled up to the joint underground cavity with the Sewament 40 corrosion-resistant cement mortar of the Mapei Company making sure that there are no bad parts. The material used is first processed with a manually filled hand cartridge filler. The joints are filled-in from a corrosion depth of 1 cm (after cleaning). Creating the fresh mortar For creating the repair mortar, … |
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Injection of cracks in the crown The cement-bound ERGELIT Kombina I injection mortar is mixed using a drilling machine with a stirrer attachment by continuously adding dry mortar and make-up water. After filling the fresh mortar into the pressure vessel, this is sealed and attached to the compressor.
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A final high-pressure flushing is carried out in order to clean the rehabilitated section before acceptance. The sewer is only optically tested for leaks, i.e. it is optically inspected for infiltrating groundwater. The last working step is the cleaning of the construction site. |
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Mar 22, 2011 Repair of an accessible brick sewers and manholes while preserving the exposed masonry by joint rehabilitation and crack injection. |
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(Image: 49785 - Titelbild Dokumentation) Process: Manhole rehabilitation Title: Replacement of a defective manhole top and repair of the surrounding road surface Location: Industrial area Limiting conditions:
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Machines and equipment:
Tools
Materials Following is a summary of the most important materials and components used in this process:
Work safety: Within the scope of the site documentation, there is no explicit … |
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Replacement of a defective manhole top by breaking open the asphalt surface For removing the manhole top, first the road surface is chiselled up with a jackhammer around the manhole frame to a width of approximately 20 cm around the frame. The width of the working space is meant to make a professional replacement of the manhole top possible and to allow the placing of paving stones after the replacement of the top thus allowing it to be integrated … |
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Installing the support ring The mortar required for the new support ring is mixed on site in the cement bucket with the shovel. A layer of mortar is applied with the trowel on the top surface of the manhole taper. The support ring is placed on the mortar and the height is controlled by means of a rule and a string. If necessary, the height is adjusted by means of light taps with a hammer on the edge of a piece of wood placed on the support ring to … |
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The last working step is the cleaning of the site. The road surface can be used again approximately 1 hour after the installation of the manhole top.
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Mar 22, 2011 Replacement of a defective manhole top and repair of the surrounding road surface. |
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