Bridge construction procedures for the incremental launching method

Izgradnja mosta preko dubokih dolina, vodnih prijelaza sa strmim padinama ili preko zaštićenih područja, može pružiti mnoge izazove. Razne prednosti u odnosu na konvencionalne metode izgradnje nudi metoda postupnog potiskivanja. Ta metoda uključuje stvaranje minimalnih smetnji za okolinu, osigurava koncentrirani radni prostor te povećava sigurnost radnika s obzirom na poboljšanu okolinu rada. Metoda potiskivanja uključuje izradu segmenta mosta na jednoj strani prepreke koja se premošćuje te zatim kretanje (ili potiskivanje) nadogradnje uzdužno u svoj krajnji položaj. Unatoč mnogim prednostima ova metoda ima prilično značajan nedostatak, a to su vrlo strogi geometrijski uvjeti. Zahtjeva se odgovarajuća kombinacija osi i geometrije nagiba te svi segmenti mosta moraju biti jednake veličine i oblika kako bi se mogao upotrijebiti standardni postupak. Iz tog razloga je metodu postupnog potiskivanja poželjno koristiti u slučajevima kada je most ravan ili konstantne zakrivljenosti tijekom cijele dužine.Bridge construction over deep valleys, water crossings with steep slopes or over protected areas can provide many challenges. A method of incremental launching offers various advantages over conventional bridge construction methods. This method involves creating minimal environmental disturbances, providing a concentrated work space and increasing worker safety in the view of improved work environment. The incremental launching method involves making a bridge segment on the one side of the barrier, and then launching the segment to its final position. Despite the many advantages that this method can offer, there is quite a significant disadvantage. The main problem is a very strict geometrical condition. The method requires appropriate combination of the axis and an inclination geometry. Also, all the bridge segments have to be in the same size and shape in order to apply the standard process. For this reason, the incremental launching method is recommended to be used in cases where the bridge is straight or constantly curved throughout the length of the bridge