In an urban communications infrastructure upgrade project, the contractor was tasked with installing a 150-meter PE110mm × 5-hole multi-duct pipeline bundle. Laying five PE pipes simultaneously across a 150m span requires high rotational torque, precise pullback control, and optimal mud circulation to prevent pipe bundle entanglement, high friction, or surface settlement in high-density traffic zones. To ensure zero surface disruption and tight schedule compliance, the client deployed the high-performance ZT-42 HDD Machine from HDD Master as the core trenchless solution.
Project Execution Highlights: HDD Master Trenchless Solutions in Action
Robust Power Configuration: The machine is equipped with a 179 kW Cummins engine, the ZT-42 HDD rig generates 18,500 N.m torque and up to 420 kN pulling force, delivering steady power for long-distance multi-duct pulling.
High-Pressure Mud Circulation: The integrated 450 L/min (8 MPa) mud pump maintains active borehole lubrication and cuttings suspension during pilot drilling and reaming.
Maneuverable On-Site Positioning: Featuring an 8–20° entry angle adjustment and compact transport dimensions (6,980 × 2,280 × 2,500 mm), the HDD rig adapted seamlessly to tight urban site layouts.
Verified Project Outcomes: Proven HDD Master Performance & Zero Downtime
100% Single-Pass Pullback Success: The 150-meter 5-hole PE110 pipeline bundle was installed smoothly in a single continuous pullback operation, with zero pipe deformation or downhole jamming.
Zero Roadway & Traffic Disruption: Maintained 100% borehole wall stability throughout the bore, preventing surface settlement under the active city road above.
Accelerated Schedule Compliance: The high pullback efficiency allowed the contractor to finish the communications installation ahead of the target deadline, lowering total labor and fuel costs.
“The ZT-42 rig handled the heavy 5-pipe bundle effortlessly. Zero downhole issues meant we finished early and kept city traffic moving normally.” — Site Engineering Lead
