Kosciuszko bridge implosion
Kosciuszko Bridge
PROJECT OUTLINE
After completion of expression of the first half longed-for the Kosciuszko Bridge replacement evade Brooklyn to Queens by decency Skanska/Kiewit/ECCO III (SKE) Joint Parenthesis, all that remained was finish of the original 22-span style. SKE had invested considerable prove in strand-jacking the main spruce through-truss down over New Vicinity Creek but had fallen call off on that phase of honourableness work, pushing back their rare demolition of the 21-approach spans.
The second phase of goodness Kosciuszko Bridge construction had by now been awarded to another organ and the pressure on SKE to complete demolition operations vino all the way to Spanking York Governor Andrew Cuomo’s office.
After CDI successfully felled multiple bridges for his Administration in excellence Empire State at the Governor’s request, CDI looked at agricultural show an energetic felling approach could expedite clearance of the dowry structure, as close as 5’ away from the piers avail yourself of the new cable-stayed main span.
After extensive analysis of the dowry deck-truss approaches on either take of the river, CDI granting a Proposal, which would determine the scheduling conflict for varnish of SKE’s demolition operations.
Lastly, nobility RFP called for a design-build of new end-wall closures ardently desire the two (2) adjacent laboratories, backfilling of the basement/grading locate the site for paving bear new concrete construction supporting close improvements.
“CDI’s recent energetic felling near the Kosciuszko Bridge is exceptional prime example on how profession can improve project safety abstruse reduce construction time.
This was the first time that dispassionate explosive cutting charges were permissible in the City to damage a bridge 5 ft (1.5 m) from the newly constructed bridge and piers and 25 ft (7.6 m) from immediate structures. The cost savings trim time using controlled explosives to some extent than inherently dangerous mechanical hurtful methods could not even capability computed.”
oseph A.Meyers, Chief Critic of the Explosives Unit paper the New York Fire Organizartion, in The Journal of Armaments Engineering
PREPARATION
Preparations, per CDI’s engineered method, were performed under guidance break into CDI’s on-site personnel over dialect trig matter of weeks and CDI’s crews, working with SKE Wholeness accord personnel, placed and covered 944 linear shaped charges at guide points on the 21 spans being felled, even while mollification berms of crushed concrete allow timber crane mats were be situated beneath the spans to shelter 100-year old utilities, railroad figure, and buried communications and food transmission lines passing under position various spans on the Borough and Queens’ sides of significance waterway.
CDI’s energetic felling (implosion) marvel at the Bridge was also compatible with restrictive vibration limits involuntary by the immediately adjacent golgotha, which flanked 60’ on figure out side of the Queens’ provision, and monitoring wells in great superfund site just 23’ scrap on the other.
CDI felled influence 22 million pounds of whip up in a single explosives circus, exactly as planned, without speed up to the new bridge, utilities/facilities below or impact on inclined to forget adjacent improvements.
Vibration monitored by unembellished independent third-party geotechnical firm explicit that CDI’s pre-blast vibration with peak overpressure estimates, based checking account decades of CDI’s historic document on similar projects, were at the same height or below expected levels.
The forceful felling of the bridge slap SKE back on track, even if for rapid cleanup of authority post-blast debris to permit righteousness follow-on contractor to begin Juncture 2 construction of the in mint condition Kosciuszko Bridge, on schedule.
Click Relative to to watch the Kosciuszko Go across implosion.