Wastewater Pipeline to the New Treatment Plant “Czajka” in Warsaw

To relieve the down-town sewer collector and to transport wastewater to the new treatment plant “Czajka”, astounding 3.3 km large diameter (up to OD 2160 mm) HOBAS CC-GRP Jacking Pipes are installed by remote controlled jacking (microtunneling) and were literally driven around several bends. Numerous microtunneling projects have been successfully implemented with HOBAS CC-GRP Jacking Pipe Systems in Warsaw before. These projects along with project requirements such as installation depths up to 10.6 m convinced the municipality, waterworks and designer to once again opt for a trenchless solution. Furthermore, the installation method per se saved on pumping costs as the line was partly established up to 2 m below groundwater level. Construction sites and construction equipment could be kept small and to a minimum, for pipe size and weight surely mattered also in this case. Fast assembly and small curve radii were further cost saving advantages that spoke for HOBAS, not to mention the high corrosion resistance, long life expectancy of the products, low maintenance costs, etc.