Abstract
To promote sustainable development of civil infrastructures, minimizing environmental impact and mobility disruptions have been elevated to a higher priority during decision-making for bridge construction scheme. This study presents a novel temporary pylon-anchor (TPA) technology for construction of self-anchored suspension bridges by considering not only safety performance, but also environmental impacts. A practical assessment method and index of sustainability associated with bridge construction technology are established to facilitate the selection of construction schemes. The sustainability index takes the environmental impact, traffic disruption, onsite construction materials and equipment, onsite construction cost, and onsite construction risk into consideration. The sustainability index associated with both conventional and novel construction methods is assessed and compared in this paper. Specifically, a novel girder-pylon antithrust system (GPAS) is proposed, which is the crucial component of the TPA technology in engineering application. In addition, an analytical approach is developed, considering both global load-carrying capacity and local stress distribution within the design and construction of the GPAS. The applicability and rationality of the proposed construction technology are illustrated by the successful application in real-world engineering. The field tests and sustainability assessment during the construction stage reveal that the proposed sustainability assessment method and analytical approach can facilitate the implementation of sustainable construction for self-anchored suspension bridges by considering both construction safety and sustainability.
Highlights
The onsite bridge construction activities can have significant impacts on environment, mobility, and safety [1,2]
On the basis of the aforementioned studies, this study presents a novel temporary pylon-anchor (TPA) technology to promote sustainable construction, which is suited for self-anchored suspension bridges with the mid-span less than 300 m, three spans and two pylons
Various finite element (FE) models are used in the parametric analysis to examine the effects of penetrating rebar diameter (PD), hole space on the perforated rib (PS), diameter (UD) and length (UL) of the U-shaped anchor rebar, number of longitudinal plates (NL), and number of transverse plates (NT) of the grille frame
Summary
The onsite bridge construction activities can have significant impacts on environment, mobility, and safety [1,2]. Due to being anchored to the girder, the main cables could not be erected until the girder has been built on lots of temporary supports, which inevitably causes serious impacts on environment and traffic This issue has emerged during the erection of several typical self-anchored suspension bridges, such as the Yongjong Bridge in Korea [13], San Francisco–Oakland Bay Bridge in the States [14], and Qingdao Bay Bridge in China [15]. The technology reduces both environmental impact and traffic disruption, the use of Susetxaipnaebnilsitiyv2e02t0e,m12p, o29r7a3ry structures (lots of stayed cables and heightened segments of the pylo3no)f 23 increases onsite construction cost and time. The technology reduces both environmental impact and traffic disruption, the use of expensive temporary structures (lots of stayed cables and heightened segments of the pylon) increases onsite construction cost and time
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
