The Kuningan Intersection in Jakarta, Indonesia, is an important traffic hub that connects different business districts with several embassies and the airport. For many years, considerable traffic jams have occurred at this junction. An attempt to solve the problem by building a conventional cast-in-place viaduct on the north side of the intersection in 2002 was unsuccessful.
Thanks to the new, 680 m long and 9 m wide Kuningan Flyover on the south side, the situation has finally improved. The flyover was built using precast concrete segments and the balanced cantilever construction method.
The General Contractor decided to use two different construction methods in order to reach the target schedule and to minimize traffic interruption during construction. The precast segmental concrete box girder for the six approach spans was erected using lifter frames, and the 160 m long main span was built using the balanced cantilever method and form travellers.
PT Delta Systech Indonesia was awarded the contracts for post-tensioning work, segment erection and engineering services. In a joint venture with Utracon Structural System Pte Ltd., Singapore, PT Delta Systech used two sets of static standard lifter frames for mounting the precast segments for the hollow box girder using the balanced cantilever method. In cooperation with DYWITECH Taiwan, PT Delta Systech Indonesia also used four form travellers for the cast-in-place balanced cantilever part of the bridge.
78 t of strand tendons were needed for post-tensioning
A total of 78 t of strand tendons were needed for post-tensioning the precast concrete elements and the cast-in-place balanced cantilever bridge spans. PT Delta Systech supplied and installed the post-tensioning systems including Types MA 6815 and MA 6819 anchorages. Furthermore, bar tendons were used for temporary stressing in order to stabilize the segments during erection work and form traveller operation.