Bridges & Civil Works · 12

Ngabi Rongchu Bridge, Bhutan

Location: Babesa, Thimphu (Thimphu-Babesa Expressway) Span Layout: 20+60m+20+20 = 120m Bridge Type: Hollow-box composite arch for main span and RC CIS girders for side spans Duration: Design 6 months + construction supervision 2 years (3 bridges over expressway) Special Features: · Use of R&D based precast alpha truss panel system for variable section hollow arch rib Monolithic connection between the top of the arch and the deck · Most optimized structural system (about 30% lower than comparable bridges in Bhutan) · Complex scaffolding system for arch construction