Case Study: Minimizing Disruption in Southeast Asia

Laying 15km of Urban Power Cable with Our Trenchless Solution

The Client: An electrical and telecommunications contractor in a high-density Southeast Asian capital (e.g., Jakarta / Ho Chi Minh City).

The Challenge: The city municipality launched a project to replace aging overhead lines with a new 15-kilometer underground power cable network to improve grid reliability and beautify the city center. The route passed through extremely congested business districts, market streets, and major intersections. Open-cut trenching was strictly forbidden due to the massive economic and traffic disruption it would cause. The contractor had to use existing utility ducts and new bores created by Horizontal Directional Drilling (HDD).

The Solution: The contractor required a "one-stop supply" of robust, reliable underground equipment that could work in tight, urban spaces. Ningbo Changshi provided a comprehensive package:

• 10-ton Hydraulic Cable Drum Trailers: To transport and safely pay out the heavy, large-diameter cable drums.

• Motorized Cable Pusher Machine: The key to the project. This machine was placed at the midpoint of long pulls to provide extra pushing force, dramatically reducing the "pulling tension" and friction on the cable, preventing sheath damage.

• Heavy-Duty cable rollers: Including straight-line rollers, manhole-entry rollers, and triple-corner rollers to guide the cable smoothly around 90-degree bends in the underground duct system.

• Cable Pulling Winch: A 5-ton gas-powered winch for pulling the pilot rope and the cable itself through the ducts.

The Execution: The team's workflow was highly efficient. The Cable Drum Trailer was positioned at the manhole. The cable was fed down, guided by our rollers. For pull-lengths over 500 meters, the Cable Pusher was set up in an intermediate manhole. This "push-pull" technique was essential, allowing the team to complete long-distance pulls in a single shift that would have otherwise been impossible. Our corner rollers were critical in navigating the city's complex underground network without the cable's side-wall pressure exceeding safety limits.

The Results: The contractor completed the 15km installation with zero road closures and minimal public disruption. By using our cable pusher, they reduced the average pulling time per section by an estimated 40%. The cable's integrity was maintained, passing all post-installation tests. This project's success has made our client the preferred contractor for the city's ongoing "undergrounding" initiative.

View our full range of underground cable laying equipment here.