Combined Epiroc power contribute to a successful bridge demolitionPublished 9/3 at 15:37
Following a tanker accident on the A40 motorway just under the railway bridges in Mülheim-Styrum in September 2020, experts determined that the traffic safety of the structures was no longer assured.
The devastating tanker fire had caused massive and irreparable damage to the bridges and demolition was unavoidable. But both important railway lines and the heavily frequented city motorway had to be completely closed for the work, at times placing enormous pressure on companies responsible for the demolition.
Albert Horn from Hückelhoven was responsible for the large scale use of seven demolition excavators. It was supported by Vortmann Baumaschinen from Marl, Heermann Abbruch from Gescher and Köster Abbruch from Haltern am See, and above all, by its valued partner Epiroc, who ensured a smooth and efficient process with five quality machines. Epiroc's chosen partner in this case was A.B.T. Abbruchtechnik from Billerbeck, who delivered and maintained Epiroc demolition tools quickly and reliably.
Epiroc impresses across the board
Bright and early at 6am on Saturday, a large supply of construction machines arrived at the fully closed A40 to complete the work which had to be undertaken in a time lapse fashion. A total of seven excavators took on the two demolition ready railway bridges at the same time, with each weighing 1,800t, requiring the impressive and efficient operation of the Epiroc products. The two CB 7500 and CC 5000 demolition cutters broke off enormous concrete sections without any loss of power, while the three hydraulic breakers HB 7000, HB 5800 and HB 4700, demonstrated high impact force with low vibration. Thanks to the parallel use of numerous quality machines, the work was successfully completed by the Tuesday afternoon, much to the delight of local residents and road users. Around 2,000 m3 of material was moved during the operation on just one weekend which required 200 truckloads to remove the debris.
Powerful in every application
The challenging bridge demolition gave Epiroc the opportunity to demonstrate the well-known advantages of its attachment tools, with both the demolition cutters and hydraulic breakers impressing. The CB 7500 concrete demolition crusher is designed for primary demolition of wide reinforced concrete structures and proved to be an excellent choice for the long reach or long boom applications due to its comparatively low weight. The wide jaw openings and high breaking forces were ideal for demolishing the thick concrete bridges. The CC 5000 demolition cutter also impressed with its modular design, easy maintenance and a combination of high crushing force, short cycle times and high reliability, with both devices being able to be rotated 360o for excellent handling.
Three hydraulic breakers, types HB 7000, HB 5800 and HB 4700, were also used on the A40, displaying flexibility in use and quiet, low vibration; attributes that are extremely helpful in a time consuming large construction site located in the middle of the city. The unique solid body concept provides high reliability, versatility, high efficiency and performance, and is known for its maintenance friendly design. The recoil force of the piston is automatically used to increase the power, without additional hydraulic energy, meaning that stress from vibrations is extremely low. The air and water inlet, which is used to connect a compressed air supply and an integrated water channel for dust suppression, is also operator friendly. The advanced control technology is particularly impressive as the performance of the demolition hammer is optimised by ‘AutoControl’, an automatic stroke length switching. The automatic lubrication system ‘ContiLube II’, the patented dust protection system ‘DustProtector II’ and the redesigned service opening all improve the longevity of components.