Langebro is a bascule bridge in central Copenhagen, inaugurated in 1954.
The counterweights of the bridge leaves consist of riveted steel boxes cast with concrete, which contain a large amount of scrap steel to increase the density and thus minimize the required size of the counterweights. The steel boxes are provided with internal steel bulkheads lengthwise and crosswise to increase rigidity and load-carrying capacity.
Under the influence of many years of seeping water, significant rust attacks have occurred on steel (both structural steel and embedded scrap) and degradation of concrete. Through thickness meas-urements (ultrasound and drilling holes) from the outside, a varying degree of cross-sectional loss has been found on the outer steel plates due to corrosion, although not to a degree that currently gives rise to acute concern. The condition of the inner steel bulkheads is unknown, which is a prob-lem as they are essential for load-carrying capacity.
The City of Copenhagen requests contact with companies that can use non-destructive methods to record the condition of internal steel structures and the aggregate concrete. The condition registration must be used to qualify the City’s assessment of the current need for renovation and the risk of unannounced breaks in the years leading up to a major renovation of the bascule leaves. Please contact Gabriella Bautista Høgh at
v64m@kk.dk no later than 18 April 2024 12:00 pm if you are interested or have any other relevant information.
Further information can be found at
https://www.kk.dk/udbud/langebro-bridge-renovation-of-bascule-span-registration-of-internal-condition-of-counterweights-by (description including pictures and illustrations) or by contacting Gabriella Bautista Høgh at
v64m@kk.dk.
There is no estimated date of publication of a contract notice within this procedure but as it is a mandatory field it is neccessary to set a date.
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Indicative notice - Langebro bridge - renovation of bascule span - Registration of internal condition of coun-terweights by non-destructive methods.