Demoler A bridge with Atlas Copco: the correct strategy
When the Department of Transport of Colorado, United States, had the need to improve the operations of the exchanger of Pecos Street and the Interestatal 70 of Denver, decided to apply an approach of Construction Accelerated of Bridges (CAP) to minimise the interferences with the traffic.
For this, built the bridge of replacement near of his emplazamiento to replace to the existent in what it was demolished, for what went to be moved on caterpillars. Besides, the demolition had to realizar in an alone night.
With this approach, all the operations had to schedule to the millimetre to attain that the process developed the best possible. It contrived a plan so that the equipment of demolition of Staker Parson Companies withdrew totally the bridge before the seven of the morning and like the demolition could not begin until the eleven of the night of the Friday, this meant that so alone had of eight hours to realizar all the work.
Besides, the work of demolition complicated by the fact that the existent bridge was in very good state. Donnie Fetters, owner and president of Performance Equipment of Erie of Colorado, provider of the equipment of demolition, explained that: “The demolition of an in good condition bridge costs the double of work. In typical works of demolition the problems of any bridge are evident, see the places by where show bars of reinforcement or where the concrete is crumbled. The majority of the structures that demolemos are practically in state of ruin. But in this case it is not like this”. In spite of this, this bridge could not adapt to the project of construction of the new ramp of the Interestatal 70 and had to demolish.
Fetters Explained that: “we Send four hydraulics hammers and two mordazas demoledoras CC 3300 of
Pecos Street HB 3000 and CC 3300.
The work of demolition did not begin directly. The caterpillars to transport the new bridge had to support in a perfectly levelled surface, so the first task of the equipment of demolition was to extend earth to support plates of steel for the step of the caterpillars. In this way, the true works of demolition began to the 3 of the morning, remaining so alone four hours to complete all the operation.
“Attack the bridge by the central part”, explained Fetters describing what he considered the ideal strategy. “Take part in this construction with these six tools was something really impressesive”.
Planted two mordazas demoledoras in the centre, one to to each side. The machines went “desgranando the building as if it was a mazorca of corn”, as it described Fetters this operation. To each side of the mordazas demoledoras planted a hammer.
Fetters Explained the operation of this combination of tools. “The hammers by himself alone are able of demoler a bridge, but stick in the reinforcements of steel”. Therefore, the mordazas demoledoras occupied to break them to facilitate the work of the hammers, accelerating in this way his rhythm of work. And like this successively, helping to free a hammer every time.
“The mordazas demoledoras CC 3300 are the best since I can use them in crowd of works, from the demolition of constructions of steel to the demolition of bridges like east”, affirmed Fetters. “And the truth is that they work very well. Already I have given him the turn to the blades, but the best of everything is that although already it has installed a new game of blades still has not been necessary to substitute any tooth. Thus, I have to congratulate to Atlas Copco by the useful life that offer his equipment”.
The representative of Atlas Copco, Rich Rose, director of channel of the western region, also affirmed that this supposed a positive testimony for Performance Equipment: “Donnie and his father, that is technical of this type of equipment, really concern for keeping his in good condition machines. The one who Donnie discovered that combine the mordazas demoledoras with a hammer podia save him time and money shows the type of man of businesses in front of the that find us. They encourage to his customers to accept works of this envergadura, by what the speed is essential. Once that they initiate the works, begins the countdown and can cost them a fortune not concluding the work to time”.
Fetters Explained: “I Remained totally convinced with the mordazas demoledoras in a previous work”. This work took place two years ago in Denver, in the avenue 84th Avenue and the Interestatal 25. From that first work, Performance Equipment has sent his mordazas demoledoras CC 3300 for other 14 projects roughly.
Fetters Affirmed that definitely it will go back to combine in future works the mordazas demoledoras with a hammer, but only will employ four machines, two mordazas and two hammers. “The truth is that the equipment that had were an exaggeration”, related Fetters. “Although it does not fit doubt that it was something positive for us, in spite of being exaggerated, taking into account the limitation of time”.
Although only they had of the half of time originally programmed to realizar the works of demolition, the equipment finished to time his work subtracting so alone something of cleaning to finish. Although they broke some hoses when attacking the reinforcements of steel, the equipment repaired immediately and did not suffer more setbacks during the works. The bridge of replacement was transported until his location without problems and according to the plan. The new bridge of the street Pecos Street opened to the traffic filmed according to the programmed.
