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Starting shaft Pulling-in a studded liner of this dimension requires the creation of a starting shaft (in this case, the downstream manhole). For the measures described here, the throat of the manhole is removed and replaced by an excavation. The lower part of the manhole remains to a depth of approximately 2.00 m. Access is by ladders. Important: Depending on the properties of the soil (un-stable soil) and the depth of the excavation (> 1.25 m) it … |
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Preparatory measures An diesel capstan winch is positioned at the target manhole for pulling-in the protective foil, the Preliner and the stud hose.
For purposes of safety, the opening to the starting shaft is provided with a wooden cover in order to reduce to a minimum the danger of persons or material falling into the shaft and, in addition, to simplify the folding … |
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Pulling-in the Preliner The Preliner hose is folded at the front to form a pulling head and this is connected to the winch cable.
The Preliner is pulled into the section to be renovated by means … |
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Pulling-in the stud hose The front of the stud hose is folded to form a pulling head and this is connected to the winch cable.
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Preparing measures First nozzles are installed in the Preliner at both ends of the section to be renovated for filling and venting during the grouting process. For this purpose, the openings are marked, cut out and roughened for welding with an angle grinder. Welding is carried out with an extrusion welder.
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Testing during grouting In order to take samples and for regular control of the TROLINING® injector grout and for protocolling the injector grouting process, sample bottles are labelled and measured. The following are also required to make a record of the injector grouting process:
At intervals of 10-15 min, the following properties of the injector grout material are tested … |
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Grouting First the first mixing unit is put into operation and the addition of water is regulated (ca. 3.6 t cement to 1.5 m3 water) until the injector grout comes out of the hose in a watery consistency. When the consistency is correct, a sample is taken and viscosity, density as well as temperature are determined. If the material does not satisfy the conditions, then the process is repeated. The testing of the second mixing unit is carried out … |
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Recreating of the branch connections Because of the size of the sewer, the reconnection of the laterals is carried out from the inside. The positions of laterals were measured in the preliminary work, so that the positions in the renovated sewer can be drawn by a marker. A hole is made in the liner at the marked position with a hammer and pointed chisel in order to check whether the lateral is indeed at the indicated position. The approximate position … |
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Manhole connection The liner is first cut back, e.g. the part of the liner projecting into the manhole is cut back flush with the manhole wall using an angle grinder (here driven by compressed air). Because of the large amount of dust, a respirator and protective goggles must be worn. The injector grout directly at the cutting edge is removed so that the stud hose and the Preliner can be better welded together.
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The replacement of the manhole on this site was carried out by the Hans Brochier GmbH & Co, Nuremberg. For this purpose, an even base was bricked up on the lower part of the shaft. The replacement of the manhole was carried out with prefabricated concrete elements. Finally the road surface was replaced.
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Mar 22, 2011 Lining of an ovid sewer DN 1000/1500 with a deflection-resistant annular gap made of load-bearing cement mortar grouting (TROLINING® preliner system), produced by injection behind a plastic inner layer which is permanently anchored to the grouting (lining with a rigidly anchored inner plastics layer). |
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Dec 09, 2022 News Kristan VandenHeuvel Olea is the first member of The Water Tower’s new transformative partnership level designed to advance new technologies to support the water industry; Olea Edge Analytics uses artificial intelligence to monitor key utility assets to detect water loss and performance issues, and help identify needed system repairs
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Dec 02, 2022 News Jan Luksch NordiTube technologies has established a global position as a technology provider for trenchless pipe rehabilitation
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Dec 16, 2022 News Pipe Core Pty Ltd For almost 15 years, Pipe Core has used its expertise in trenchless technology to support Australia and New Zealand’s trenchless industry with quality products and equipment from some of the world’s leading European suppliers.
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Dec 21, 2022 News Dr. Anissa Grieb The safe and affordable supply of drinking water in the EU under the pressure of climate change is a key priority. The European joint project SafeCREW, led by the DVGW Research Centre at Hamburg University of Technology, will address this key priority over the next three and a half years.
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Dec 20, 2022 News Dr. rer. nat. Marco (IOER), e-mail: Neubert The effects of climate change are increasingly affecting rivers & lakes and threatening the ecological balance in these waters. Adaptation measures are needed. However, in order to implement them in a targeted manner, more knowledge is needed about the complex interactions in aquatic ecosystems.
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Dec 30, 2022 News Liz Bothwell Water & Wastewater Equipment, Treatment and Transport (WWETT), the world's largest annual trade show for wastewater and environmental service professionals, unveiled its conference program. The event takes place February 20-23, 2023 at the Indiana Convention Center in Indianapolis, IN
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Jan 02, 2023 News Maria Andrén Leading Water Technology Company Awards $10,000 to Donovan Sippel
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Jan 04, 2023 News Watercare |
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Jan 13, 2023 News Trenchless Australasia Rob Carr continues to kick goals on the construction of the Quinns Main Sewer project for Water Corporation with approximately half of the project now complete.
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Jan 12, 2023 Summary: This module provides an introduction to the first of the four basic activities within the framework of integral urban drainage management according to EN 752, the INVESTIGATION. It is intended to cover all performance aspects of the drain and sewer system to the appropriate extent in order to provide the basis for the subsequent assessment of their performance. Therefore, this module provides an overview of the required investigation steps, … |
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Jan 12, 2023 Investigation is the first of the four fundamental activities included in integral sewer management. To a reasonable extent, it is to cover all performance aspects of the drain and sewer system in order to create the basis for the next step (the evaluation of the capacity of the drain and sewer system). (Image: Integrated Sewer System Management Process according to DIN EN 752) [EN752:2008] |
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Jan 12, 2023 The obtained results serve to show compliance to due diligence, and also as the basis for the determination of all activities to be carried out with respect to rehabilitation and maintenance in the form of:
(Image: Integrated Sewer System Management Process according to DIN EN 752) Important: The purpose of the investigation influences the way in which it is conducted (e.g. choice of methods, level of … |
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Jan 12, 2023 The investigation includes the following activities according to [EN752:2008]:
[EN752:2008] (Image: Flow chart of the investigation based on EN 752) This course ends … |
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Jan 12, 2023 In what respect must the information be checked to ensure the quality of the overall result? Verification of the quality of information is of utmost importance for the quality of the overall result in all the analyses steps – regarding:
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