This 4.1-km (2.5-mi)-long viaduct is the first section of the Bangalore – Nelamangala Expressway in India. The 16.4-m (54-ft)-wide precast segmental box girder carries four lanes of traffic and is built within the median of the NH4 highway. Typical spans vary from 28.5 m (93 ft) to 39.4 m (129 ft) and use epoxy joints and external post-tensioning. A special span crossing of 44 m (144 ft) is achieved by using cantilever piers in conjunction with a typical 39.4-m (129-ft)-span. The substructure consists of cast-in-place piers on bored pile foundations. The viaduct is erected span-by-span with an overhead gantry.
Design-Build Contractor: Navayuga Engineering Co. Ltd.
Prime Consultants: JMI Pacific
IBT’s Role: Conceptual, detailed design and construction engineering