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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