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Balanced Cantilever Erection

For cast-in-place and #precast #segmental bridges, a balanced #cantilever bridge is mostly #constructed. Cast-in-place #bridges are constructed for short bridges with a longer span, and for longer bridges with shorter spans precast segmental bridges are constructed. To construct the balanced cantilever bridge using precast #segments #ground cranes, #lifting frames, and self-launching gantries are used. Self-launching #gantries work on the principle of linear movement erection. Whereas, for the free erection sequence #process ground cranes and lifting #frames works. 🔉----------------------------------------- Usually, box #girder sections are used for the making of a #balanced cantilever bridge. Precast segments can be used for a span of 50-70m if the depth of the span is constant. In case the depth of the #span is varying then the demand for the #flexural #capacity of the span would be more. In this case, it is difficult to use the precast segment. Lifting and #transportation of heavy segments also become difficult. Thus, for such #scenarios cast-in-#segments are used. 🔉----------------------------------------- For the erection of a balanced #cantilever bridge, good access is required throughout the length. The quickest and easiest #erection system with the least investment is provided by cranes. Different segments can be erected using #cranes at once. The reason why a bridge is #constructed using a ground crane is to provide access to the site and height of the #piers as a balanced cantilever bridge is mostly constructed in inaccessible #terrains. For the construction of a balanced cantilever bridge which will be of long and curved span, tall #piers and spans located over water deck-supported lifting frames are used. In cases like this #exceptional lifters can deal with heavier sections and #canal boat conveyance can help in minimizing #geometry and weight limitations. 🔉----------------------------------------- The connection of the fixed lifting frames is secured to the tip of the cantilever and has a particularly restrictive load-carrying capacity. The turning arms can lift from behind or horizontally and are used to balance cantilever bridges because of the twist that they can transfer to the deck. It is easier to place segments on the pier table and the anchoring of segments to the deck becomes necessary during the operation.