Project Overview
The Yangtze River 12.5-meter Deepwater Channel Project (Phase I) was a major navigation improvement initiative in China. Located between Taicang and Nantong, the project aimed to deepen the channel to 12.5 meters, enabling 50,000 DWT container ships to navigate at full tide. The first phase began in 2012 and was completed in 2014.
The Challenge
The riverbed in this section of the Yangtze is subject to strong currents and significant scour. To stabilize the channel, engineers used soft mattresses made of interlocking concrete blocks. These mattresses needed to be flexible, durable, and capable of acting as a single integrated structure. A key challenge was connecting thousands of individual concrete blocks so they could be lifted, laid, and remain stable on the riverbed.
The Solution
Four Brothers Rope supplied high-strength polypropylene (PP) rope nets for the prefabrication of interlocking block soft mattresses. The rope nets were laid out and combined with steel reinforcement frames before concrete was poured. This embedded the nets within the blocks, creating a flexible yet strong connection between adjacent blocks. The prefabricated mattresses were then lifted and installed on the riverbed using controlled laying techniques.
The PP rope nets offered excellent corrosion resistance, high tensile strength, and flexibility—essential properties for long-term performance in a demanding river environment.
The Result
The rope nets helped form integrated soft mattresses that resisted scour and stabilized the riverbed. The project successfully achieved its 12.5-meter depth target, improving navigation capacity and safety on one of China’s busiest waterways. The use of embedded rope nets demonstrated an effective approach to constructing durable, flexible protection structures for large-scale waterway projects.
