PROJECT UPDATE WAVESCREEN REPLACEMENT

Led by Undersea Construction Limited, this project phase focuses on the replacement of structures between D and E Pier, covering eight bays. The works updates include:-

Demolition and Removal

The process of demolishing and removing all components of the upper wavescreen and the cantilevered deck has been a joint effort between the primary contractor and the maintenance team from Chaffers Marina Limited. By June, the entire cantilevered deck had been successfully dismantled and all remnants cleared from the site.

During the demolition phase, it was necessary to move the existing power box located in the work area to a temporary location. This task was executed by Euro Electrical Limited, with logistical support provided by Chaffers Marina Limited.

As for the upper wavescreen, along with its connected infrastructure, the complete removal and appropriate disposal of it from the three northern bays have been carried out successfully. Following the installation of the new wavescreen in these bays, the contractor is set to continue with the work on the remaining sections.

Refurbishment of underpinning piles

Three foundational piles, situated at the north end of the walkway, were in need of refurbishment. The attached steel splints were taken off and the piles were thoroughly cleaned. Significant amounts of timber and steel were cut away and removed from the base of these piles to prepare them for the sleeving process.

To facilitate the sleeving works for the piles, the temporary walkway between D and E Pier was temporarily disconnected. Following this, pile splice and cap plates were crafted and put in place, all set to be linked with the cantilevered beam walkway.

Upper wavescreen replacement works

The project encompasses the introduction of new steel works, including H-Piles, splice plates, and walers. All these elements have been crafted offsite and have undergone a thorough galvanization process- offering resistance to corrosion and prolonging its lifespan.

To replace the existing timber wavescreen, the marina has opted for vinyl sheet piles. These are recognized for their resilience, resulting in less maintenance that will offer substantial cost savings over time. Vinyl is also environmentally friendly, enhancing our commitment to sustainability.

Cantilevered walkway works

The work on the cantilevered walkway includes the installation of several steel parts, including cantilevered beams, joists, diaphragms, and flat bars. It also involves the application of fibre reinforced plastic (FRP) deck grating.

The new walkway will be raised 500mm higher than the existing one. This height increase has been strategically designed to proactively tackle potential problems brought about by sea level rise. By accounting for this environmental concern, the project aims to ensure the longevity and future usability of the walkway.