SINOVO Heavy Industry has introduced the NPD1800 Slurry Balance Pipe Jacking Machine, a model that merges robust mechanical design with intelligent control systems for demanding underground construction. Designed to address the complexities of modern infrastructure projects, this equipment is particularly suited for environments characterized by high groundwater pressure and variable geological conditions, including soft soils, sand, gravel, and rock layers .
Core Technical Specifications
The NPD1800 is configured with a total installed power of 2×37 kW on the cutter drive, generating a maximum torque of 300 kN·m . It features a 2180 mm outer diameter and a total length of 4200 mm, weighing approximately 24 tons . The equipment supports a rotation speed of up to 2 rpm and is equipped with a steering cylinder system rated at 1000 kN × 4 sets, enabling high-precision trajectory control with a maximum steering angle of 5.5 degrees .
Key Features and Application Scenarios
The NPD1800 utilizes a slurry balance system to maintain the stability of the tunnel face, effectively controlling surface settlement and ensuring safety in unstable ground . It incorporates an independent water injection and discharge system to manage the mud circulation efficiently . The machine is designed for long-distance jacking, with a typical single-drive length exceeding 200 meters, making it suitable for urban sewage systems, water supply pipelines, and utility crossings .
Overseas Project Application and Field Feedback
In a recent urban drainage system upgrade project in a Southeast Asian country, the NPD1800 successfully completed an approximately 180-meter drive through mixed ground conditions, including over 60 meters of solid rock sections. Throughout the operation, the machine performed reliably, achieving the expected advance rates without any incidents of face collapse or abnormal surface settlement. The on-site crew reported that the steering system responded promptly and maintained the specified alignment tolerances with ease. The remote control console significantly reduced manual labor inside the launching shaft, greatly enhancing operational safety and overall project efficiency. Both the client and the supervision team expressed strong satisfaction with the equipment’s performance and durability.
Post time: Sep-09-2026