Project Hamriyah, Sharjah, United Arab Emirates

Hamriyah Power and Desalination Station

A mix of master skills

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In 2014, Six Construct finalized the construction of a seawater intake, pumping station and outfall system of the Hamriyah Power Station, which processes and desalinates seawater to generate power and potable water. These works help meet the increasing demand for water in Sharjah and the Hamriyah area.

The Hamriyah Station in the Emirate of Sharjah is owned and operated by the Sharjah Electricity & Water Authority (SEWA). In order to meet growing market demands and boost capacity, the power and water desalination plant was developed in several phases, boosting the power level (phase I) and introducing 20MIGD reverse osmosis technology in the desalination plant (phase II), which processes incoming seawater.

In 2013, Six Construct was asked to build a Seawater Intake and Outfall System to supply the seawater required to the site’s incremental development. The contract included three packages and called for a unique mix of civil, foundation and marine expertise, which happens to be Six Construct’s strong suit.

The pumping station

The seawater pumping station (420,000 m³/h) uses 7 drum screening channels, a distribution bay and pump chambers. The temporary works included the installation of a cofferdam and a deep well dewatering system, which required an open excavation reaching -10.50 m LAT. The reinforced concrete structure (48,000 m³, 8,000 tons of steel reinforcement) was built on a raft foundation installed partially on 162,800 mm diameterbored piles. The wing wall of the pumping station is a combination of tangent piles and an anchor sheet pile wall. Six Construct also took care of the finishing touches, such as epoxy coatings, installationof GRP handrails, gratings and curved covers, and so on.

The intake

After the removal of the existing breakwater and protective core-locs (2,050 nos) in front of the temporary cofferdam, Six Construct built a new 280m breakwater to open up the reclaimed land. Precast core-locs (2,000 nos) from our yard in Ajman were transported to the site by barge. In addition to the new basin revetment, the team also installed navigation aids and an oil boom.

The outfall

The outfall system of nearly 1 km consists of three parts: a reinforced concrete upper channel (16,000 m³, 2,000 tons steel reinforcement); a transition structureusing a secant pile wall and an underwater concrete slab; and the lower channel with rock protection along the banks.

Facts and figures

Excavation
-10.50 m LAT
Breakwater
280 m
Raft foundation
162 piles
Precast core-locs
2,000 nos
Pumping station
420,000 m3/h

Project details

Project name

Hamriyah Power and Desalination Station

Area(s) of expertise

Water intake, Power, Petrochemical and Desalination, Pumping Stations & Hydro-Electric Power Stations (Turbines)

Contract type

Design & Build

Location

Hamriyah, Sharjah, United Arab Emirates

Stakeholder(s)

BESIX, Six Construct

Client

Sharjah Electricity and Water Authority Sharjah (U.A.E.)

Building Period

2013 - 2014

Total value

€ 24.8 million

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