Wet-Cast Monolithic Water Chambers As Spring Tappings
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05-Rohre_112-135_en_Layout 1 04.11.16 11:31 Seite 116 CONCRETE PIPES AND MANHOLES Schlüsselbauer Technology GmbH & Co KG, 4673 Gaspoltshofen, Austria Concrete – the all-rounder: wet-cast monolithic water chambers as spring tappings In many corners of the world, a functional supply of clean drinking water is still anything but a given. So it is little wonder that cities and regions with particularly high quality tap water regularly rank highest in international comparative studies on quality of life. Alongside hygiene and health aspects, factors such as reliability and sufficiency of the drinking water supply also play a significant role. Continuous mainte- nance, regular redevelopment and adjustment of efficiency of the underlying infrastructure are some of the most important tasks for com- munities and responsible utility companies. The Perfect system for manufacturing wet-cast, individual monolithic manhole bases developed by the Austrian company Schlüsselbauer Technology has established itself worldwide over the course of the last decade. The precast components produced using the Perfect production method are usually installed as part of sewer manholes. The versatility of this innova- tive production technology is shown in many ways, including the fact that it is increasingly used by various operators in the manufacture of monolithic water chambers. Two current examples of drinking water catchment systems in Switzerland and Southern Germany illustrate the successful use of wet-cast components outside of the usual field of application as part of sewer and drainage systems. Ralph Mitterbauer, Schlüsselbauer Technology process, this was the company that ulti- with how the project was progressing: "I'm mately prevailed over the other tenderers really happy that we have been able to Bavaria: Full redevelopment with its bid, an essential component of which carry out this extensive redevelopment of of spring tappings included the use of three water chambers the water source quickly and without any with DN1000 dimensions produced from complications. In particular, we have been Following a decision made by the munici- SCC to create a water catchment. The con- pleasantly surprised by the water chambers pality of Bayerisch-Eisenstein, in the district crete water chambers were made exactly from Beton Heller. The spherical head of Regen in Bavaria, three drinking water to measure by renowned manufacturer of anchors installed on the upper side made sources were fully redeveloped this summer pre-assembled concrete components Josef manoeuvring the massive precast compo- as part a set of comprehensive measures. In Heller & Sohn GmbH from Parkstetten and nents a piece of cake for our employees. order to secure the water supply for gener- were delivered directly to the construction On top of this, the gaskets integrated at the ations to come, the planners in charge of site together with two overflow shafts. Over manufacturing plant made it considerably the project placed great importance from the course of the general redevelopment easier to connect the inlets and outlets, the very start on finding a solution that process, the components produced from a meaning construction progressed more would not result in compromises on quality single cast based on the model of the man- quickly, which is, of course, in the interest of for the company carrying out the project or hole bases manufactured as monoliths were our contractor and the local population." for the materials being used. The construc- installed in open construction as water tion company finally selected to carry out catchment tanks. The H&T Baugesellschaft Monolithic water chambers in one pour the work in Bayerisch-Eisenstein was H&T mbH site manager, Dipl.-Ing. Manuel Baugesellschaft mbH from Ruhmanns fel den. Christl, who is responsible for the work in The monolithic water chambers installed Over the course of the project selection Bayerisch-Eisenstein, was extremely pleased during the redevelopment of the springs in DN1200 water chamber manufactured from flowing concrete View inside a DN1500 concrete water chamber tailor-made by with individually moulded channel and gaskets encased in concrete. Wyss AG, with multiple inlets and 4 chambers at the water catchment site in the municipality of Vitznau, on Lake Lucerne. 116 CPI – Concrete Plant International – 6 | 2016 www.cpi-worldwide.com 05-Rohre_112-135_en_Layout 1 04.11.16 11:31 Seite 117 CONCRETE PIPES AND MANHOLES The massive water chambers were flown by helicopter to the site User-friendly steel moulds for manufacturing wet-cast concrete of the water catchment system in Vitznau, high above Lake Lucerne. components with individually customised channel configurations. Bavaria were manufactured by Beton neer René Leisibach from HSK Ingenieur part of the water catchment redevelopment Heller in Parkstetten from self-compacting AG in Küssnacht, a particularly spectacular project. Since then, they have been making concrete from a single cast, using plant-inte- installation took place as part of the reno- a significant contribution to the seamless grated gaskets at the lateral connection vation of the local water supply. As the land water supply for the municipality of Vitznau. points. The internal diameter of each of the underneath the Rigi mountain massif is diffi- precast concrete components manufac- cult to access, two DN1200 and DN1500 Wyss AG – Pioneer in the manufacture tured in the same way is 1000 mm, with a monolithically cast water chambers with a of wet-cast water chambers wall thickness of 150 mm and a construc- total weight of over 8.5 t were flown to the tion height of 700 mm. The "centrepiece" of site of the water catchment system by heli- The company Wyss AG Betonschächte, the water chambers used is clearly the cus- copter. In addition to their flawlessly with its registered office in Eggiwil in the tom-made channel together with the open- smooth surface, the water chambers pro- Canton of Bern, is part of the Swiss group ings for the inlets and outlets. In this partic- duced by Swiss manufacturer Wyss AG of companies O. Wyss AG Bauunterneh - ular case, all the water chambers have Betonschächte using the Perfect process mung, which was founded in 1960. At the three similar configurations with a channel stand out above all due to their 4-chamber start of the 1990s, master-builder Othmar diameter of DN150 as well as two inlets system, drinking water drainage system Wyss developed a framework for the pre- and two outlet openings with diameters of with chrome steel sieve and an integrated fabrication of inspection manholes. What 150 and 100 mm respectively. overflow. Both water chambers were deliv- was initially conceived for the purposes of ered ready to install as complete assem- streamlining his own construction firm, was Change of scene to Switzerland: Vitznau blies together with inner ladders with entry soon in high demand in the region and led on Lake Lucerne in the Canton of Lucerne. aids, safety covers and shoe scrapers as to initial sales to different construction firms. Here, under the supervision of project engi- well as joint sealing, and were installed as Little by little, the range of standard man- Concrete water chambers manufactured as monoliths using Concrete water chambers with seals and overflow shafts integrated the Perfect process, for use in water catchment systems in in the plant produced by Beton Heller, shortly before being shipped Bayerisch-Eisenstein. to the construction site. www.cpi-worldwide.com CPI – Concrete Plant International – 6 | 2016 117 05-Rohre_112-135_en_Layout 1 04.11.16 11:31 Seite 118 CONCRETE PIPES AND MANHOLES A label on the finished, cast water chamber providing information Production of high quality precast concrete components for the on all the relevant product parameters and project data. underground construction market has been ongoing at the Josef Heller & Sohn GmbH site in Parkstetten, Straubing, for over 60 years. holes was expanded to cover all standard situations. Thanks to con- Heller were tested in the categories watertightness, water penetra- sistent further development, the supplementary, yet economic and tion and pressure resistance and were exclusively awarded the best low-cost system of custom-made manholes is now available for spe- marks (source: KIWA Bautest GmbH 2015-2016). cial cases. By 1998, the demand had grown so quickly that a new, larger production hall in Schüpbach, Emmental was required. A Perfect method: simple manufacturing of complex components rational production department coupled with an extensive ware- house means Switzerland-wide delivery is possible within a short For the manufacturing of these innovative precast concrete compo- space of time. The prefabricated concrete product palette is con- nents, the companies Heller and Wyss use the Perfect production stantly being expanded. The highlight of the Wyss AG range is the system from the Austrian developer Schlüsselbauer Technology. prefabricated water chambers, certified by the Swiss Water and Using this method, which has been successfully implemented for Gas Industry Association (SVGW), and which together with the years, customised monolithic manhole bases and special compo- company's many years of experience, justify its excellent reputation nents with individually moulded channel configuration, can be man- as a water catchment specialist. ufactured using an economical and largely automated process. With the Perfect Configurator, you have an easy-to-operate plan- High component quality