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(Free-Press-Release.com) October 26, 2009 -- Construction. Construction Magazine, The Master Builder Connecting the Construction industry to the key decision makers, Construction Tenders, Infrastructure News Construction exhibitions, trends in civil engineering and infrastructure
Construction. Construction Magazine, The Master Builder Connecting the Construction
Infrastructure
Design & Construction of Steel Composite Arch Bridge Using CFT

THE ROYAL GOVERNMENT of Bhutan had planned to construct a city road in the heart of Thimpu called Hospital Link Road, which would ease the traffic congestion on the main road and establish a parallel corridor to the Secretariat complex. One of the major components of this road is the construction of a bridge across the Chubachu River running through the icturesque landscape of the Capital City. The terrain is hilly and the stream has high velocity of flow. After detailed site investigation and review of alternative schemes, an aesthetically pleasing open spandrel arch bridge with overall length of 48m has been planned and detailed

design prepared. The main ribs of the arch and verticals are of concrete filled tubes (CFT), which act as a steel – concrete composite element. The twolane deck is of RCC construction, composite with steel grillage deck system. Due to adoption of steel composite structure, both the project requirement of aesthetics with economy could be satisfied.The arch rib has been pre-fabricated in segments in workshop and transported to site on hilly road. All steel components of the bridge have been fabricated in workshop through full-strength welding and site assembled with High Strength Friction Grip (HSFG) bolts. The arch rib segments are erected by segmental cantilevering method supported by temporary steel on the arch foundation itself and stay cables systems of backstays and forestays

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