Driving steel piles into the seabed is hard. Doing it from a machine that works over water is even harder. The operator must lift each pile carefully, hold it perfectly vertical, and then push it deep into the seabed using strong vibrations.
A recent video shows exactly how to do this job right. In the video, an extend arm with a vibratory hammer -mounted on a standard excavator-drives piles quickly and precisely. In good soil conditions, the setup drives piles at up to 12 meters per minute. That is much faster than traditional methods.
RIVER built this custom solution for water-based solar pile driving. Here is how it works.
1.Customized Extend Arm for Solar Pile Driving
The job site had water depths of 7 to 8 meters. A standard excavator boom cannot reach the bottom at that depth. Short reach forces the operator to move the machine again and again. That wastes time and creates safety risks near unstable water edges.
RIVER solved the problem. Engineers designed a 15-meter extend arm specifically for this photovoltaic piling project. They paired the arm with a high-frequency vibratory hammer.
For extra heavy-duty work, RIVER also offers desktop extension arms. These robust designs work perfectly with vibratory hammers on floating platforms. In this case, the host machine was an XCMG excavator. After the crew fitted the RIVER extend arm, the improvements came immediately:
- Higher efficiency: The long reach covers more pile positions without moving the machine.
- Better control: The vibratory hammer delivers straight, consistent force, so each pile goes in straight.
- Improved safety: Operators stay on firm ground, far from the water edge and its hazards.
- By combining a purpose-built extend arm with a vibratory hammer, RIVER turned a difficult water job into a smooth, productive process. You can learn more about vibratory hammer technology here.
2.Other Applications of the Extend Arm
The extend arm is not only for solar pile driving. It adds real value to many other jobs. In special cases, desktop extension arms from RIVER provide the same reliable reach and attachment compatibility.
Application 1 – Deep Trenching for Pipelines
To lay pipelines across riverbeds, you need extra reach. A long extend arm keeps the excavator on solid ground while reaching deep trenches. See our guide to pipeline trenching with long reach booms.
Application 2 – Shoreline Dredging
Removing silt or debris from shallow water zones becomes easy with an extend arm. The machine stays safe on shore, and the arm reaches over water. Check how RIVER arms perform in dredging projects.
Application 3 – Demolition
For high-reach demolition or unstable structures, an extend arm keeps operators at a safe distance while delivering precise force.
RIVER offers fully customizable extend arm solutions for major excavator brands, including CAT, SANY, XCMG, Komatsu, and Hitachi. We provide different lengths, reinforcements, and attachments – buckets, vibratory hammers, and grab tools – for your specific job site. Where a desktop extension arm configuration is required, RIVER can adapt the design accordingly.
With the right extend arm, you gain reach, safety, and productivity.
3.Summary
Water-based steel pile driving does not need to be a challenge. When standard booms cannot reach the seabed, a custom extend arm from RIVER is the answer.
In the featured video, a 15-meter extend arm with a vibratory hammer allowed an XCMG excavator to lift, position, and drive steel piles precisely into the seabed. The result: faster cycles, better accuracy, and safer operations. Even when customers specify desktop extension arms for unique platform setups, RIVER delivers the same quality and performance.
From solar pile driving to dredging and demolition, RIVER helps you work farther, deeper, and safer. Contact our engineering team to discuss your project.
4.Frequently Asked Questions
Q: What is the maximum water depth for using an extend arm with a vibratory hammer?
A: RIVER has successfully delivered solutions for water depths of 7 to 8 meters, as shown in this case study. We can design custom configurations for deeper applications.
Q: Can RIVER customize an extend arm for my specific excavator brand?
A: Yes. RIVER provides custom extend arm solutions for CAT, SANY, XCMG, Komatsu, Hitachi, LiuGong, Doosan, and other major brands. See our compatibility chart.
Q: How fast can a vibratory hammer drive a steel pile?
A: Typical driving speed ranges from 4 to 7 meters per minute, reaching up to 12 meters per minute in non-silty soils. Read more about vibratory hammer efficiency.
Contact RIVER today to get a custom extend arm built for your machine and your job site.
