The Permata Hijau Flyover in Jakarta: Road Safety with DYWIDAG Post-Tensioning Systems
Construction— APAC— Indonesia— Bridges
The Permata Hijau Flyover in Jakarta, Indonesia is 544m long and 10m wide. The flyover is one of several infrastructure projects that the Jakarta Provincial Government has initiated to improve traffic flow in Jakarta. Furthermore, thanks to the new viaduct, road traffic no longer has to cross the Jakarta-Serpong railway tracks directly. The viaduct was built in only one year and was officially opened in January 2016.
PT Delta Systech Indonesia was the subcontractor for post-tensioning work, the erection of the hollow box girder segments and engineering services. To erect the precast segments using the balanced cantilever method, PT Delta Systech Indonesia cooperated with DSI’ s Singapore licensee Utracon Structural System Pte Ltd. using 2 sets of static lifter frames and one special movable lifter frame. The static lifter frames were used to lift the segments in the side spans, and the movable lifter frame was used for the segments of the main span located above the railroad.
The movable lifter frame is designed for erection work in cases in which only one side of the segment supply area can be accessed. The lifter is able to move above the pier tables so that precast segments can be positioned in both directions. In the case of the Permata Hijau Flyover, the supply of the precast segments was prohibited in the active rail road track area. The special lifter frame was used for the first time for a bridge construction project in Indonesia.
The special lifter frame has 2 control cabins at the front and at the rear and is equipped with 16 large tires that are moved simultaneously by remote control. The lifter is powered by an electrical motor and has a hydraulic system with a maximum capacity of 65t. Thanks to the special lifter frame, the segments can be erected faster, cleaner and more reliably. Furthermore, when using this equipment, traffic flow does not have to be interrupted.
The segmental box girders of the bridge were post-tensioned using internal Type 15-0.6 " and 19-0.6 " DYWIDAG Strand Tendons and Type MA 6815 and MA 6819 Anchorages. In total, PT Delta Systech supplied and installed 105t of Type 0.6 " Strand. Furthermore, DYWIDAG Bar Tendons were used for the temporary stressing and stabilization of the segments during erection work.
Owner Dinas Bina Marga Pemprov DKI Jakarta, Indonesia General Contractor Lampiri-Multi-Brantas KSO, Indonesia Consulting Engineers PT Delta Global Struktur, Indonesia Consulting / Supervision PT Intimulya Multikencana, Indonesia Engineering PT Delta Systech Indonesia, Indonesia and Utracon Structural Systems Pte Ltd., Singapore
DSI Licensees PT Delta Systech Indonesia, Indonesia and Utracon Structural Systems Pte Ltd., Singapore PT Delta Systech and Utracon Scope Supply, installation, engineering services, technical support, supervision DYWIDAG Products Type 15-0.6 " and 19-0.6 " DYWIDAG Strand Tendons, DYWIDAG Bar Tendons, 2 static and 1 movable lifter frames
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