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Marine Structures

Introduction

Marine structures are a specialty of Jacobs which has many year's experience of work of this type. The firm is one of the shareholders in the Offshore Certification Bureau which is a UK Government appointed certification authority for North Sea structures. The OCB also acts for the Dutch and Indonesian Governments in the same role. Our work includes breakwaters and seawalls, dredging and reclamation, quay walls, jetties, wharves and piers.

We provide the following Services:

Feasibility studies
Conceptual and preliminary design studies
Deailed design and contract documentation
Supervision of construction
Marine surveys and investigations
Design of repair and remedial works
Special research or development studies
Certification of marine and offshore structures

Specialist work includes the design of mooring and fender systems, roll on and roll off jetties, marine piling, floating structures and seawater pumping stations.

Projects

PAA Contract 162 - Sea Rescue Stations at Chep Lap Kok, Hong Kong

Client: Highway Department, Hong Kong Government

The preliminary studies, the detailed design and construction supervision of two breakwater structures, two boat-house structures, launch points from the northern seawall, seawalls, reclamation for the ancillary buildings and associated infrastructures were carried out. Detailed design also included determination of marine environment and assessment of berthing limitations.

Jetty Extension for Lamma Power Station

Client: Nishimatsu-China Harbour Joint Venture

An alternative design for the new Jetty Extension for Hong Kong Electric was done for the contractor. The jetty is designed to accomodate 140,000 dwt bulk coal carriers, with a draft of 18m depth of water.The jetty serves the Lamma Power Station, which is the main power supplier to Hong Kong Island. The jetty is 310m long by 26m wide with a concrete RC deck supported by over 400 stell pipe piles. The proejct involved the re-design of the steel pipe piles with the aim of reducing the toe levels and changing the decking system from In-situ to precast concrete unites to reduce the reconstruction duration and cost.

Hong Kong Gold Coast Marina, Tuen Mun.jpg (8517 bytes)

Hong Kong Gold Coast Marina, Tuen Mun, Hong Kong

Client: Pacific Marina Developments

The marina provides berths and associated facilities for 300 pleasure craft, including long vessels of up to 33.6m in length. The marina is constructed within an existing breakwater which has been specially provided for this purpose. The marina comprises floating concrete pontoons held in posiition by tubular steel piles. Articulated aluminimum access ramps are provided to allow for tidal movements. Power and water supplies are provided at each berth.