Waterfront Walls & Structures.

Many waterfront walls have been constructed, not only in harbours, but also along riverbanks and coastal foreshores. These are usually long-term structures, built to last, as part of a wider flood defence strategy.

Special consideration must be given to structures in the marine environment. The structure will have underwater elements having to withstand an often-hostile environment. However conditions may be even more severe above the water line, particularly in tidal zones, with corrosion to steel and deterioration to concrete and other elements.

Structural deterioration or undermining may necessitate some form of refurbishment. Modern specialist materials and techniques can be used to repair many problems.

Change in use, perhaps from port activity to residential or commercial, is often the time for refurbishment with the expectation of significant extension to usable life.

Port & Harbour Layouts
Berths, Quays & Jetties
Piers
Breakwaters
Waterfront Walls & Structures
Dredging & Reclamation
Pontoons & Floating Structures

Bhavnagar Port

The lifting gate at Bhavnagar port had exceeded its design life and was suffering from leakage that prevented the continued maintenance of the correct water level in the impounded port basin. This was caused by corrosion to the underground sheet pile cut-off wall because of severe scouring of the concrete panels on the seabed.

Beckett Rankine inspected site surveys and developed various designs to solve the problem. The works were carried out by the contractor on a turnkey contract and we reviewed drawings, surveys and other documents as required. The leak was repaired by patching the hole and grouting.

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Millennium Dome - Anthony Gormley Statue

A large exhibition was set up at Greenwich for twelve months to celebrate the new millennium. A number of substantial sculptures were included with several focusing on the water at this prominent location on the River Thames. Anthony Gormley's statue "Cosmic Cloud" was selected for a position at the site's river entrance.

Beckett Rankine designed the supporting substructure for the sculpture using a dolphin from the passenger landing pier. Four cast iron piles originating from the 100 year old coaling jetty were augmented by a new pile with bracing to resist the statue's additional wind loading.

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Wandsworth Riverside Quarter

Riverside Quarter is part of the regeneration of the southern bank of the River Thames converting a brownfield site into new residential properties with modern riverside facilities with boathouses and a riverbus service. The old river walls restrain the tidal river flow and also form part of the flood defences along the River Thames.

Beckett Rankine are involved in condition surveys of the river walls and have designed works to strengthen and enhance these traditional masonry structures. Environmental issues have been considered and mitigation measures include new barges for birds to nest and roost.

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Poole Dinghy Harbour

A small private dinghy harbour to provide shelter for two pleasure boats with direct access to Poole Harbour and the sea beyond. Although the protected area is only 17m x 10m it has created a pleasant environment and a useful addition to the back garden of one of the substantial residential properties along this coastline.

Beckett Rankine planned, designed and supervised the project. The marina walls were constructed using cantilevered sheet piles driven into the firm sandy bed. The seabed within the marina was dredged to a level that enables access by small craft at all but the very low tides.

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Lydney Docks, River Severn

Lydney Docks are situated on the upper reaches of the Bristol Channel and were originally constructed to facilitate cargo transfer to and from the region by barge. Having become disused and then fallen into disrepair following the transfer of cargo transport to the roads, the docks have been listed as a Scheduled Ancient Monument.

Beckett Rankine examined the docks together with the canal and prepared alternative schemes for regenerating the water area surrounding land. Our brief covered consideration of re-locating and enhancement of the flood defences and finding a new use for the harbour.

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Grays Town Wharf

This project is part of the urban renewal of Grays Town on the Northern bank of the River Thames in Essex. It involves the refurbishment and opening up of the Old Town Wharf to provide public access to the riverside. The old timber, steel and concrete berth structures have been replaced by an area for public amenity.

Beckett Rankine designed the new sheet piled river frontage to replace the old failing quay wall. The structure was constructed in front of the old wall which was left in place and used to provide part of the lateral restraint. The flood defence level had to be maintained throughout.

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Maryport

Commercial shipping trade at the port of Maryport has ceased with the exception of a small but active fishing fleet. Consideration is therefore being given to improve the surrounding area with the harbour providing a focal point to maintain the marine heritage. Alternative urban regeneration schemes have been assessed.

Beckett Rankine studied all the marine aspects of the project. This included a condition survey of the dock gates and recommendations for the design of a replacement system. An assessment to provide a forecast of future dredging and infrastructure maintenance costs was also provided.

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Gujarat Sub-Sea Pipeline

British Gas plan to set up an LNG import terminal at the port of Pipavav, to distribute gas to Northwestern India. Consideration was given to construction of a subsea pipeline to link this terminal to the existing pipelines on the other side of the Gulf of Cambay. These pipelines would access India's centres of industrial population.

Beckett Rankine advised on the marine conditions, having previously worked on a number of projects in this area. The relative merits were considered for various locations by examining tidal and current records together with geotechnical data from offshore boreholes.

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Ramsgate Lifeboat Station

A new state-of-the-art lifeboat station has been constructed within the protected waters of the historic Ramsgate Royal Harbour. In keeping with RNLI policy an architecturally attractive building was needed. The building had to provide accommodation for crews and enable quick and easy access to both inshore and offshore lifeboats.

Beckett Rankine designed and supervised construction of the sub-structure, which was a reinforced concrete platform supported on steel tubular piles. Our work also included close liaison with the architects to provide all the engineering input to the building superstructure.

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Bristol Channel Ferry Feasibility Study

The local authorities around the Bristol Channel wanted to examine the potential for reintroducing ferry services across and along the Bristol Channel. The objective was to create a public transport system and encourage people to move between the coastal resorts to visit the nearby tourist attractions and other facilities.

Beckett Rankine co-ordinated the study. This involved reporting on engineering feasibility at more than 12 possible destinations, as well as identification of suitable craft. The feasibility of each potential route was examined together with likely demand, costings and sources of revenue.

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