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Case studies showing installation of large modular expansion joints in cable-supported bridges.
An ICSBOC 2018 conference paper describes the particular challenges that can arise in the installation of expansion joints in cable-supported bridges, and associated solutions
The proper installation of sensibly selected, well-designed expansion joints in bridges is a key factor in ensuring durability and minimising life-cycle costs. This is especially true for the large expansion joints generally required by cable-supported bridges, which can present very significant challenges – for example, due to their size, which can make transport from factory to site and installation very difficult, or due to the connections to steel superstructures that more often arise in long-span bridges. By describing such challenges, our paper on this subject, recently presented at the 2018 International Cable Supported Bridge Operators’ Conference (ICSBOC), can enable designers and constructors of major bridges to gain a valuable deeper understanding of the subject.
The following images illustrate some of these challenges and solutions, and the paper can be downloaded here for further information – but please contact us if we can assist you in relation to this or any other matter.
Transportation challenges associated with very large expansion joints
Challenges associated with lifting into position on site
Connection to the main structure – design and execution considerations
Further installation considerations
Queensferry Crossing, Scotland (2017): Adjustment of pre-setting during installation of a 23-gap TENSA®MODULAR joint. Adjustment of pre-setting of very large joints can be especially demanding, especially on long steel cable-supported structures, since the pre-setting requirement (the width of the bridge’s movement gap) may change significantly on the day of installation
Incheon Grand Bridge, South Korea (2009): When fully installed (ideally with surface 2 to 5 mm [0.08 to 0.2 in] below the road surface), an expansion joint should provide a safe driving surface. In the case of this very large TENSA®MODULAR joint, anti-skid surfacing has been applied to half of the driving surface to improve tire grip
Designing for the future with easily replaceable expansion joints