CASE STUDIES
Largest hose liner UV CIPP project in Hamburg
RELINEEUROPE and Rohrsanierung Jensen set new standards with the rehabilitation of a sewage pipe stretching over 1.1 kilometers along the River Elbe in Hamburg.
The spectacular projects in Hamburg's lively St. Pauli quarter are not all at street level. Beneath this quarter in the Hamburg-Mitte borough, a steel pipe of 1,600 millimeters in diameter runs underground. Some sections are up to 80 years old and the wall thickness had been thinned by abrasion and corrosion over the years. Weakened and exposed to static forces, some deformation of the pipe had already occurred. After close investigation, the pipe was therefore no longer deemed stable.
Structural load-bearing capacity a crucial requirement of the rehabilitation measure
One of the key requirements of the rehabilitation was to avoid reducing the pipe's hydraulic capacity while reinforcing it structurally. This significantly limited the cost-effective rehabilitation options. The city of Hamburg therefore opted for rehabilitation with a UV light-curing GRP hose liner, even though this technology had not yet been used for such a comparatively large project. The part of the old steel pipe in need of rehabilitation measured 1,133 meters in length with a diameter of DN 1600. For the installation, the total length was divided into eight rehabilitation sections with individual lengths of up to 230 meters. RELINEEUROPE's Alphaliner1800H was used. This liner can be produced for diameters up
34
to DN 1900 and has some of the highest mechanical properties of any CIPP hose liner in the world. Thanks to its outstanding mechanical load-bearing capacity, the hose liner can especially be used in projects with very high structural requirements that additionally necessitate/involve high wall thicknesses. In combination with the UV equipment produced by RELINEEUROPE, liners with walls up to 30mmthick can be cured using UV light.
RELINEEUROPE produced the eight liners in total, one after the other, at its headquarter factory in Rohrbach and delivered them to the Hamburg jobsite on a just-in-time basis. Having completed the expansion of its production building and facilities at the turn of the year, RELINEEUROPE was in a position for the first time to produce Alphaliners of up to 600 meters in length and weighing up to
| July 2021 |
www.draintraderltd.com
70 metric tons. The heaviest liner for the Hamburg project measured 230 meters in length and weighed an enormous 45.5 metric tons, making it the heaviest GRP hose liner to date. Together with the reinforced transport box produced specifically for this project, the record-breaking liner reached an impressive gross weight of 52 metric tons. For the first time, two 300 metric ton cranes had to be ordered to load it onto the heavy- duty transporter.
Curing of 20.5mmwall thickness with 24,000 watt lamp output at 1.2 meters per minute
All eight Alphaliners had a wall thickness of 20.5 millimeters and weighed approximately 200 kilograms per meter. As curing such a high wall thickness in the course of this extensive project was a particular challenge,
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92
