Moveable bridge inspection in Ancam Port North Kalimantan, Indonesia

The Ancam Port is equipped with a moveable bridge to anticipate tides. The Moveable Bridge structure is a steel frame bridge with a length of 35,740 meters. This vertical free movement is accommodated by the pontoon but cannot deform in a horizontal plane in the direction of the bridge extending, causing damage to the connection between the pier and the moveable bridge. Under the pontoon there are indications of piles emerging from the riverbed and recurring collisions occur due to tides. This causes leakage so that water enters and causes an imbalance from the pontoon and a collapse of the Moveable Bridge occurs. The movable bridge analysis method is carried out using SAP 2000 software. Based on the analysis of the collapse the moveable bridge is able to withstand the planned load on the condition that the pontoon has to function properly. The solution to re-enable the moveable bridge is to use a geofoam-type styrofoam pontoon wrapped in steel plates. This research is expected to be a solution to the problem of movable bridges in Indonesia.