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Abstract

Bridges constructed between the 1960s and 1970s have been damaged to different degrees during operation due to excessive traffic flow and severe overloading of vehicles, and thus cannot meet the requirements for safe passage of vehicles and navigation. Therefore, they need to be demolished and rebuilt. To safely, economically and efficiently demolish the old bridges and rebuild them in-situ, this paper studied a design concept of integrated construction and demolition. Based on the Wudou Bridge demolition and reconstruction project in Foshan, the combination of theoretical analysis and computational simulation was utilized to conduct a multi-scheme study from the perspectives of economy, safety and construction periods after field investigation and site conditions. The results show that the scheme of employing the old bridge as a support for new bridge construction and then leveraging the new bridge to help the demolition of the old bridge after comprehensively considering demolition and construction can save the amount of construction supports for new bridges, especially the amount of water supports and platforms, with the construction measure cost for the whole bridge saved by 33.5%.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.025

First Page

153

Last Page

157

Submission Date

March 2025

Reference

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