Yangzhou Dilong YD3000 Rock Pipe Jacking Machine has been successfully applied to the Xiamen Cross-sea Pipe Jacking Project and completed all construction works. With powerful rock-breaking capacity, stable overall operation and outstanding adaptability to complex working conditions, the machine efficiently overcomes difficulties in long-distance cross-sea jacking and successfully fulfils the 708-meter twin-line cross-sea jacking task, fully demonstrating the robust construction capacity of our large-scale rock pipe jacking machines for challenging cross-sea projects.
The Xiamen Cross-sea Pipe Jacking Project features special and complicated construction conditions, representing a high-difficulty trenchless marine project. Compared with conventional on-land pipe jacking, marine construction is subject to complex water pressure, significant ocean current impacts and poor stratum stability, making long-distance twin-line cross-sea jacking extremely challenging. Construction risks such as uneven excavation resistance, tunnelling deviation and ground disturbance may easily occur during operation. Extremely stringent requirements are imposed on the sealing performance, tunnelling stability, attitude control accuracy and long-distance continuous operation capacity of pipe jacking equipment. It stands as a highly demanding project for the construction of underwater pipelines across the sea.
To cope with the special working condition of twin-line long-distance cross-sea jacking, our YD3000 Rock Pipe Jacking Machine gives full play to the exclusive strengths of large hard-rock pipe jacking equipment. Optimised specifically for marine environments, the machine boasts reliable sealing performance and sufficient structural rigidity to withstand interference from complex underwater water pressure. Equipped with a high-precision attitude control system, it dynamically adapts to unique marine geological characteristics and adjusts tunnelling parameters accurately. It effectively avoids common problems encountered in long-distance cross-sea construction including excavation deviation, machine stagnation and unsatisfactory tunnel forming quality, fully meeting the rigorous technical specifications for twin-line long-distance cross-sea jacking.
Throughout construction, the YD3000 Rock Pipe Jacking Machine operated smoothly with superior adaptability and maintained continuous and efficient tunnelling, enabling precise control over tunnel alignment and construction accuracy. The machine successfully accomplished the 708-meter twin-line cross-sea jacking works. The whole construction process remained safe and controllable with excellent tunnel profile quality, completing this challenging cross-sea pipe jacking project efficiently and highlighting the equipment’s core advantages in tackling marine complex conditions and long-distance continuous tunnelling.
The successful completion of the Xiamen cross-sea project fully verifies the excellent performance and reliable stability of the YD3000 Rock Pipe Jacking Machine under marine working conditions and for long-distance twin-line jacking. This project fills the application gap of our large-scale pipe jacking machinery in long-distance cross-sea construction. It accumulates valuable practical experience for the development of underwater pipelines and marine trenchless projects in coastal cities nationwide, and continuously facilitates the high-quality construction of underground infrastructure in coastal urban areas.