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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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Jan 12, 2023 (Image: Schritte) The first step in the process of investigation of drain and sewer systems is the review of their performance capacities based on given information. The review is done based on available incidence reports and analysis results that might provide an insight into possible performance impairments. It thus forms the basis for determining the scope of the inspection [EN752:2008] |
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Jan 12, 2023 Examples for records of incidents are according to EN 752: Flooding, blockages, breakdown of sewers, functional failure of a pressure line, disease, physical injury or fatal accidents of the operational staff or other people, sewer damage, compliance to the conditions for the discharge into the drain and sewer system and the receiving waters, visual inspection, complaints regarding odour nuisance, hydraulic recalculations, functioning of the mechanical … |
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Jan 12, 2023 For large drain and sewer systems, it can be useful to combine the evaluation of incidents with other operational, hydraulic, economic and strategic aspects, such as the relevance of the development (hospital, industrial plant, etc.). The result could be a priority ranking or area ranking for planning the investigation in the respective subcatchment areas. (Image: Example of an area ranking) |
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Jan 12, 2023 (Image: Schritte) In the second step of the investigation, the gathered results serve as a basis for the review of the information regarding the capacity and the determination of the scope of the investigation, i.e. whether and to what extent investigations will be necessary with respect to:
aspects, and which of the investigation methods that are subsequently explained are suitable … |
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Jan 12, 2023 What is relevant informationen? (Image: Schritte) In the third step, all available relevant information of a drain and sewer system is collected and reviewed. This step provides the basis for the subsequent planning of all further activities. Relevant information here includes: 1. Inventory data, 2. Required permissions and statutory requirements, 3. Existing operational, maintenance-relevant, structural and safety-related measures for problem solving,… |
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Jan 12, 2023 What if inventory data is incomplete? (Image: Schritte) In step 4 it is ensured that sufficient information on the drain and sewer system is available for the investigation. Therefore incomplete inventory data must be completed. An update of the condition data should also be considered. With increasing age, the significance of earlier condition data becomes considerably limited, because the structural condition of drains and sewers as well as structures … |
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