Bridges are vital components of national infrastructure, driving economic development by connecting regions, enhancing transportation efficiency, and facilitating trade. Among various types, arch bridges offer a superior solution for long spans, providing maximal navigational clearance due to their minimal girder depth, yet making no compromise on structural integrity or aesthetic quality. However, their construction presents significant challenges, primarily due to the need for carefully sequenced execution and the reliance on temporary works to ensure structural stability before completion. This study highlights several failure case studies and construction challenges, including those from Bangladesh, to illustrate the critical role of construction staging and temporary support systems. These failures underscore the consequences of inadequate planning, under-designed temporary structures, and insufficient attention to construction-phase behavior. Based on these insights, this study proposes a systematic methodology for sequencing temporary works and arch bridge construction, further validated through a case study of a recently constructed arch bridge. The objective is to mitigate construction-stage risks and enhance overall structural reliability. The findings reinforce that the success of arch bridge projects relies not only on sound engineering design but equally on the precision, discipline, and integrity of on-site execution.

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Mr. Md Yeasin Mostafiz