Diaphragm Wall Construction

Diaphragm Walls are a highly engineered deep foundation and earth-retention solution widely used in the UAE for deep basements, underground structures, metro stations, tunnels, marine works, and major infrastructure projects. 

At APCC, diaphragm wall construction is carried out to provide structural support, excavation stability, and effective groundwater cut-off for complex projects across Dubai, Abu Dhabi, and the wider UAE.

This system is particularly suitable for projects requiring very deep excavations, high structural stiffness, and minimal ground movement, making it ideal for dense urban environments and critical infrastructure developments.

How Diaphragm Walls Work

A diaphragm wall is a reinforced concrete retaining wall constructed in the ground before excavation, using specialized excavation and concreting techniques.

Panel Excavation

APCC excavates the wall panels using hydraulic grabs or trench cutters under bentonite or polymer slurry, which stabilizes the trench and prevents collapse during excavation.

The wall is constructed in panels to the required depth, often extending into an impermeable soil layer to achieve effective groundwater control.

Reinforcement and Concreting

Once excavation is complete, steel reinforcement cages are lowered into the trench, followed by tremie concreting from the bottom up. The concrete displaces the slurry, forming a continuous, watertight reinforced concrete wall.

Adjacent panels are constructed sequentially to create a continuous diaphragm wall system.

Advantages of Diaphragm Walls 

• Excellent earth retention and groundwater cut-off

• High structural strength and stiffness

• Suitable for very deep excavations

• Can serve as a permanent basement or structural wall

• Minimal impact on surrounding structures