MR.NDRC
CASE STUDY · AL KHAIL ROAD · DUBAI

695 metres.
One decisive drive.

A landmark large-diameter microtunnel delivered beneath one of Dubai’s most critical transport corridors.

Al Khail Road microtunnel cutterhead at breakthrough in Dubai
Drive length695 m
Internal diameter3,500 mm
Outer diameter4,200 mm
MethodMicrotunnelling
Intermediate jacking4 IJS
Guidance systemVMT Gyro

Controlled delivery at scale

The 695 m drive used four intermediate jacking stations to distribute thrust along the 4,200 mm OD pipe string.

Alignment control was provided by a VMT Gyro guidance system throughout the long-distance drive. The combination of planned IJS operation, guidance control, slurry management and coordinated site execution supported the successful crossing beneath Al Khail Road.

Intermediate jacking station inside the Al Khail Road microtunnel
Intermediate jacking station · 4 IJS used
Al Khail Road microtunnel breakthrough team
Breakthrough team · Dubai
Interior view of the large-diameter tunnel and intermediate jacking station
Inside the 3,500 mm ID tunnel
Large-diameter microtunnelling machine transported to site
4,200 mm OD machine mobilisation