The Yangzhou Dilong TPD2200 EPB-slurry dual-mode pipe jacking machine has been successfully deployed in Dubai and Abu Dhabi to support local municipal pipeline infrastructure construction. Undertaking trenchless pipe jacking works for urban pipelines, it delivers reliable domestic equipment support for the efficient advancement of overseas municipal projects across the Middle East.

Construction sites in Dubai and Abu Dhabi feature unique geological conditions dominated by pure sandy formations with loose structure, poor stability and high permeability. Such desert geology carries high risks of sand inflow, collapse and ground settlement during excavation. The complex working conditions impose stringent requirements on the pipe jacking machine’s formation adaptability, tunnelling stability and precision of face pressure control. Conventional single-mode pipe jacking equipment cannot satisfy safe construction in pure sandy strata.

To address the construction challenges posed by typical pure sandy strata in Dubai and Abu Dhabi as well as the refined construction requirements for overseas municipal works, Yangzhou Dilong adopted the TPD2200 EPB-slurry dual-mode pipe jacking machine for the project. Integrating both earth pressure balance and slurry balance construction modes, the machine enables flexible switching between operation modes according to real-time tunnelling conditions in desert strata. Specially designed for excavation in loose sandy ground, it effectively tackles the industry challenges of frequent collapse and difficulties in face stability maintenance during tunnelling in pure sandy formations.

During construction, leveraging its dual-mode advantages, the TPD2200 EPB-slurry dual-mode pipe jacking machine precisely balanced face pressure and effectively stabilised loose sandy strata throughout the works, eliminating potential safety hazards such as sand inflow and collapse. The machine maintained steady tunnelling and controllable attitude, fully meeting the requirements of long-distance, high-precision trenchless construction in complex local desert geology and demonstrating the robust performance of domestic dual-mode pipe jacking equipment in projects under special geological conditions overseas.

The successful deployment of the TPD2200 pipe jacking machine on projects in Dubai and Abu Dhabi has broken through the bottlenecks of trenchless construction in pure desert sandy strata and guaranteed safe and efficient delivery of the overseas municipal pipeline project. Moving forward, Yangzhou Dilong will continue to rely on diversified, highly adaptable trenchless pipe jacking equipment and proven construction technical solutions to further explore the overseas infrastructure market and facilitate high-quality delivery of more international engineering projects.