Reconstruction of Motorway in Full-Road Width Across 12m

Transcription

1 SUPER with SB 250 TP1 Fixed-Width Screed in operation on the German A 61 motorway. Reconstruction of Motorway in Full-Road Width Across 12m

2 SUPER with SB 250 TP1 Fixed-Width Screed in operation on the German A 61 motorway. Reconstruction of Motorway in Full-Road Width Across 12m Seite 1/6 Job Site Details Pavement reconstruction on the A 61 motorway near Bornheim, Germany When reconstructing a 5km stretch of the A 61 motorway in Rhineland-Palatinate, Germany, a SUPER paved two new lanes including hard shoulder in full-road width. After all, the motorway will have to carry a high volume of traffic, especially in terms of heavy goods vehicles. This is why the team of contractor Wilhelm Faber GmbH & Co. Bauunternehmung KG opted for a SB 250 Fixed-Width Screed in TP1 version to tackle the 12m paving job. The screed is capable of achieving a high precompaction even when working in full-road width, due to the unique VÖGELE High Compaction Technology. Length of section: 5km Paving Details Pave width: 12m Layer thickness: base course 18 34cm binder course 8.5cm Paving Material 01 // 01 // Especially when working in large widths, the combination of paver and MT Mobile Feeder significantly boosts the daily laydown rate and enhances pavement quality. The feeder Base course: 26,000t of base course mix (0/32) Binder course: 12,000t of binder course mix (0/16) Wearing course: mastic asphalt Equipment uncouples the paver from mix supply by the feed vehicles, thus providing for a consistent flow of mix. The feeder does so in non-contacting operation and without docking. This way, the paver keeps paving nonstop and produces results of prime quality. MT Mobile Feeder SUPER with SB 250 Fixed-Width Screed in TP1 Version HAMM DV 90, DV 85, HD 90, HD+ 140 and Rubber-Tyred Rollers

3 The A 61 is Southern Germany's westernmost motorway connection with The Netherlands and Belgium. The motorway begins at the Hockenheim junction, home to the Formula 1 circuit of the same name, and continues in The Netherlands as the A 74. This international motorway link caters to a high volume of heavy goods traffic. Tenders for reconstruction were invited for several sections of the A 61, among them the one beginning near the Bornheim junction in the Alzey-Worms district and extending over 5km. The job involved paving 18 to 34cm base course (0/32) and 8.5cm binder course (0/16). Faber was awarded the contract for pavement reconstruction in the northbound direction of Koblenz. Seite 2/6 Job Site Details Pavement reconstruction on the A 61 motorway near Bornheim, Germany Length of section: 5km Paving Details Pave width: 12m Layer thickness: base course 18 34cm binder course 8.5cm Paving Material Base course: 26,000t of base course mix (0/32) Binder course: 12,000t of binder course mix (0/16) Wearing course: mastic asphalt Equipment MT Mobile Feeder SUPER with SB 250 Fixed-Width Screed in TP1 Version HAMM DV 90, DV 85, HD 90, HD+ 140 and Rubber-Tyred Rollers

4 Seite 3/6 Paving in full-road width without joints In order to achieve maximum pavement quality, the two new lanes of the A 61 and the hard shoulder were to be paved without joints. In view of the large pave width of 12m, the preferred candidate to do the job was SUPER combined with an SB 250 FixedWidth Screed. Featuring a basic width of 2.5m, this screed builds up to its maximum pave width of 13m with fixed bolt-on extensions and hydraulic bolt-on extensions. Even in this maximum configuration, excellent stability of the screed is always guaranteed. And on the job site, the screed fully displayed the key advantage resulting from this stability outstanding evenness in a transverse direction also when paving in large widths. A further, valuable benefit of the SB 250 is its high compactive effort. This, too, was crucial for reconstruction work on the A 61 motorway in order to guarantee that the new lanes would stand up to the high traffic load. Therefore, Faber used the screed in TP1 version which, in addition to the tamper, is equipped with 1 pressure bar. VÖGELE High Compaction Technology The pressure bar operated by pulsed-flow hydraulics is a special feature of VÖGELE Screed Technology, allowing to achieve highest precompaction. While paving, the pressure bar forces the mix down until it cannot be compressed, i.e. compacted any more. In other words, until an equilibrium is reached between the force exerted by the pressure bar and the counterforce by the compacted mix. This not only yields a maximum of truth to line and level and evenness, but also means to pave very economically. 02 // 02 // The VÖGELE ErgoPlus operating concept provides an optimal overview and userfriendliness at the highest level.

5 Paving team much impressed by the Fixed-Width Screed We d already worked with a VÖGELE Fixed-Width Screed once before, says Michael Weirich, Operations Manager at Faber. So we knew how well everything works. The truth to line and level and compaction performance were great right from the start. Paving without joints, across this large width, was a very relaxed job, indeed. SUPER operates in ECO Mode Despite the large pave width, the tracked paver could work in ECO Mode most of the time. In this operating mode, the liquid-cooled 6-cylinder diesel engine revs down and reduces its power output from 182kW to 169kW at the press of a button on the paver operator s ErgoPlus console. In ECO Mode, noise levels are particularly low. That, on this wide job site, working in ECO Mode was possible at all furnishes proof of the SUPER s powerful design. The power installed in this cutting-edge paver allows to handle even large-scale jobs with ease and cost efficiency. Conceived for a maximum pave width of 13m, it is the ideal machine for paving asphalt without joints on motorways, airports or other large traffic areas. Seite 4/6 Auger Height Adjustment Across Full Pave Width Yields Numerous Advantages Fast and easy adaptation to varying layer thickness thanks to auger height adjustment across the full pave width (hydraulic auger height adjustment available as an option). As a result, optimal spreading of mix, even when paving thin layers or when layer thickness varies. The possibility of adjusting augers in height, complete with bearing boxes and limiting plates for the auger tunnel, allows to move the paver on the job site without a need for time-consuming conversion. Large auger blades (diameter 480mm) provide for an optimal head of mix in front of the screed, even when laydown rates are high.

6 Paving on top of the old concrete pavement On part of the motorway section, the new asphalt layers were placed onto the existing concrete pavement. On the rest of the stretch, water-bound base was built. The SUPER placed base course with a varying layer thickness of 18 to 34cm, which required 26,000 tonnes of mix. The VÖGELE machine made good progress at an average speed of 4m/min. Then 8.5cm binder course were paved. The SUPER placed 12,000 tonnes of binder course mix operating at a speed of 5.5m/min. For grade and slope control, the paving team used two multi-cell sonic sensors referencing from a tensioned wire and transmitting their measurements to NIVELTRONIC Plus, the VÖGELE System for Automatic Grade and Slope Control. Finally, wearing course of mastic asphalt was paved on the 5km stretch of motorway. Seite 5/6

7 A fleet of HAMM rollers for compaction A fleet of HAMM rollers were on the scene for final compaction. The heavyweight models DV 90, DV 85, HD 90 and HD+ 140 as well as rubber-tyred rollers compacted the asphalt pavement to the specified density. Especially the HD+ 140 roller, HAMM s new 14-tonne flagship, was the star: This roller does the work of two! said Operations Manager Michael Weirich. 03 // 03 // VÖGELE pavers and HAMM rollers worked as a team on the A 61 motorway. Seite 6/6