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Boundary conditions Method Rehabilitation of a concrete manhole by lining it with the Vertiliner system, an on-site UV- cured-in-place pipe product from VERTILINER GmbH & Co. KG. (Image: Schematic principle of a manhole cross-section) Location Side street in a residential area Boundary conditions
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During the renovation of a concrete manhole by CIPP lining it with a UV-curing pipe liner, the following machines and equipment were primarily used:
(Image: Laser measuring device "Focus" from the company Faro for 3D measurement of the manhole ) (Image: Side view of the workshop and material truck ) (Image: … |
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(Image: Tripod with height safety device and rescue lift )
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The lining tube used from VERTILINER GmbH & Co. KG consisted of
(Image: Customised, impregnated lining tube with UV light protection membrane) Vertiliner is always a seamless GRP tube made of resin-impregnated glass fibre sheets, which is produced individually and precisely to fit and extend from the benching to the top edge of the road. |
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(Image: helmet with helmet lamp and gas mask) Within the scope of this construction site documentation, no explicit reference is made to the safety and health protection measures to be implemented in principle. Compliance with the relevant regulations of the employees' liability insurance associations and / or other national associations is the responsibility of the companies carrying out the work. It is therefore possible that individual safety-related … |
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Site set-up (Image: Construction site protection) The site set-up included traffic safety, the definition of parking and storage areas for equipment and materials, and the installation of the power and water supply. In this case, the storage area is the workshop and material truck, which was parked on one lane of the roadway in the immediate vicinity of the manhole to be rehabilitated. Which meant that only one lane was available for road traffic. For … |
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3D measurment of the manhole with laser The Vertiliner is a cured-in-place pipe product that is produced to fit precisely for manholes with different geometries. The necessary precise measurement of the inner contour of the manhole - here referred to as measurement - was carried out in this application with a 3D laser. (Image: 3D laser for manhole measurement at the open manhole with transport cover) (Image: Connecting the laser device to the smartphone … |
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In the run-up to the rehabilitation measure, the connect sewer had already been rehabilitated with a CIPP liner. The connection of the CIPP liner to the shaft had to be secured in a further work step during the lining of the manhole base with hand laminate. (Image: View into the manhole to be renovated) (Image: The manhole to be renovated from above) Documentation In addition to measuring the shaft with the laser, the inlets of the main sewer were recorded … |
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(Image: Rough cleaning of the manhole to be rehabilitated with water) In this rehabilitation case, it was sufficient to flush the manhole to be rehabilitated with water as part of a rough cleaning to remove superficial contamination. According to the manufacturer, cleaning with a high-pressure cleaning vehicle was not necessary. High-pressure cleaning is also not appropriate for heavily deteriorated manholes, as this can lead to damage extension and … |
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The test to determine whether there were any hazards from substances in the manhole to be rehabilitated was carried out with the aid of a gas measuring detector, which was first calibrated and then lowered into the manhole. (Image: Calibrating the gas measuring detector) (Image: Preparation for inserting the gas detector into the manhole) |
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(Image: Cutting off the step rings with the angle grinder ) (Image: The relatively new step rings are cut off ) The climbing aids consisted of relatively new step rings - single row (blue). These were cut off with an angle grinder and the protruding steel remains from step rings were then ground off. The remaining old step rings (double row) were knocked off with a hammer. (Image: step rings) (Image: Residues of the knocked off old step rings and new … |
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In order to ensure that the stand-alone Vertiliner system would fit snugly against the manhole wall, all surface damage and voids present there were reprofiled by restoring/supplementing the concrete cross-section with a cement-based, fast-setting repair mortar that was mixed on site and applied with trowel. (Image: Filling the cavities in the area of the removed old climbing aids ) (Image: Reprofiling in the area of the manhole cover frame, cover … |
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For the expansion of the impregnated lining tube by means of compressed air, an auxiliary level support surface must be created in the manhole bottom at the level of the bench. The same applies to the manhole wall. For the latter application, GRP sheets were cut to fit to temporarily cover the upper half of the outlet and inlet. The GRP panels were fixed with stainless steel, dowels and screws using a drilling machine. (Image: Dowel placement for the … |
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The prefabricated and impregnated lining tube was prepared for installation in the workshop and material truck. For this purpose, the lining tube was shortened by approx. 5 cm (2 in.) at the lower end and the inner, translucent membrane was prepared for the closure at the upper and lower ends to form the so-called pressure bag. Both closures were necessary to apply the internal pressure required for the installation. (Image: Shortening the vertiliner) (… |
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(Image: Lining tube with packer and base plate on the roller conveyor) From the material and workshop truck, the lining tube was lowered into the manhole via the roller stretcher with the help of a trolley and inserted. A marking on the side of the lining tube, which was applied immediately after production, indicated the zero side and had to be aligned according to the marking on the roadway. This guaranteed alignment at the optimum height and rotational … |
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(Image: Insertion of the light chain into the lining tube ) The curing of the stand-alone Vertiliner system was done with UV light. The light chain consisted of 9 UV spots. To insert the light chain, the packer was opened again after the first pressurisation. The centric guidance of the light chain was guaranteed by the guide rope stretched between the base plate and the packer. After the lining tube had been attached to the inner wall of the manhole, … |
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(Image: The cured CIPP manhole lining from the outside ) (Image: View into the CIPP manhole lining ) The cured lining tube (CIPP liner) was cut off at the level of the traffic road with an angle grinder. A wooden gauge was used to mark the CIPP liner at the level of the transition into the manhole taper (cone). This piece of CIPP liner was cut off at the level of the manhole cover and removed so that a load decoupling is created and traffic loads … |
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(Image: View of the manhole base with dowelled GRP panels on the bench ) The final work included the lining of the manhole base, consisting of bench and channel, with GRP sheets and hand laminate. A laminate is a combination of polyester resin with glass fibre mats. Polyester resin is a synthetic resin that hardens after adding a MEKP hardener. This process is irreversible. To produce an adhesive base, the manhole base is roughened in advance with … |
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Following the lining process, the rehabilitated manhole must be tested for leaks. For this purpose, a leaktightness test is carried out with water. [ [DINEN1610:2015]] (Image: View into the lined manhole before the leakage test) (Image: Closing the openings by means of packers ) (Image: Manhole is prepared for the leakage test) (Image: Filling the manhole with water ) (Image: Manhole is completely filled with water) (Image: Draining the water ) (Image: … |
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Mar 21, 2022 Manhole rehabilitation with the Vertiliner system, a seamless GRP tube made of resin-impregnated glass fibre textile (lining with cured-in-place pipes), which is produced individually and with a precise fit and extends from the bottom of the manhole to the top edge of the manhole (CIPP). |
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The side fill is not only used to transfer vertical loads. If the side fill is well compacted against the existing soil, it also allows horizontal loads (earth loads) to be activated on the pipe. These horizontal loads do not impose any additional stresses but, on the contrary, have a supporting and thus load-distributing effect on the pipe. This is because the more evenly the loads are distributed around the pipe circumference, the more only normal … |
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The side fill is not only used to transfer vertical loads. If the side fill is well compacted against the existing soil, it also allows horizontal loads (earth loads) to be activated on the pipe. These horizontal loads do not impose any additional stresses but, on the contrary, have a supporting and thus load-distributing effect on the pipe. This is because the more evenly the loads are distributed around the pipe circumference, the more only normal … |
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In contrast, flexible pipes (plastic pipes) yield to vertical loads by deformation. This results in not only vertical but also horizontal deformation (elliptical deformation figure). This deformation activates a lateral bedding reaction of the soil (additional parabolic stress distribution), which is thus called upon to partially bear the loads. In this case, the flexible pipe and the soil jointly bear the external loads. These bedding reactions … |
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In contrast, flexible pipes (plastic pipes) yield to vertical loads by deformation. This results in not only vertical but also horizontal deformation (elliptical deformation figure). This deformation activates a lateral bedding reaction of the soil (additional parabolic stress distribution), which is thus called upon to partially bear the loads. In this case, the flexible pipe and the soil jointly bear the external loads. These bedding reactions … |
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In the following, the creation of the lower bedding layer is shown using the example of a concrete pipe with base. Pipes with base are usually placed on a prepared, horizontally levelled and compacted bedding of suitable soil material, directly on the prepared trench base. Even in the case of pipes with base, it is necessary to re-compact the edge areas at the base with a hand tamper to ensure full-surface support. (Image: Preparation of the lower … |
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