Subsea Pile Driving Hammers Size 3500kj

MHU3500S pile driving systems

MENCK’s MHU series of hydraulic underwater hammers in the 3500 kj energy range are easy to operate and easy to maintain, but easy doesn't mean they lack in features. These top quality systems also maximise energy efficiency and come with many safety aspects.

The Largest Hammer in the World

The MHU3500S is part of MENCK’s above and shallow water series and is reported to be the largest hammer in the world, ready for any challenge. It satisfies all requirements of offshore pile foundation installation, even future requirements.

The double acting hydraulic system produces energy efficiency upwards of 95%. The MHU anvil is designed for maximum energy transfer with built-in vent holes allowing water trapped inside the pile to escape.

How Does the MHU Series Work?

The lightest hydraulic pile driving system in its class, the MHU series is designed to minimize its footprint on a working barge. Our clients benefit by reducing the number of add-on´s (pile segments) for inclined jacket piles (less welding = less installation time).

As the latest result of our unique expertise and experience in pile driving, the MHU 3500S system combines all the advantages of our hydraulic hammers, for example its light weight. So the MHU 3500S, with a 6 m pile sleeve, exerts 6.5 kJ per ton of weight. A ratio far above the power/weight ratio of our competitors.

The MHU3500S is submersible and delivers its blow directly to the pile, eliminating the need for expensive adapters and cushion rings. Energy is transferred directly from the ram to the pile, also eliminating the need for a cushion block.

Modular design allows for easy transport, assembly and maintenance. No special tools are necessary; mobilization can be conducted in even the most remote locations, making your job that much easier.

Key features & Benefits

Slim design with simple and uncomplicated operator controls
Compatible with standard MENCK power packs and control systems
Energy levels are seamlessly adjusted from 10% to 100% of nominal energy through the MHC 21 hydraulic control system with hammer performance monitored in real time
Free riding and submersible up to 300 meters
Quick and easy pile sleeve adaptation for various pile sizes, reducing set-up time thanks to the exchangeable insert system
Suitable for subsea portable templates such as the StabFrame™
Quick connect coupling for hydraulic hoses to save time during operation
Suitable for operation on drilling vessels through moon pool
Various options available to suit the application including vertical hose connection configurations in order to fit into tight spaces
Higher energy output with a lower total hammer weight thanks to the double-acting hydraulic drive unit which not only pulls the ram weight up but also pushes it back down
Lower ceiling clearance for transport and a smaller footprint on deck with offset lifting supports and eccentric pins
Safety shut-off devices. If the shackle leaves its horizontal resting position, indicating tension on the crane line, the hammer automatically stops. Sensors monitor hammer to pile contact. If there is not proper contact to the pile, the hammer will not operate
Reduced energy loss with the pressure compensation system. An external compressor fills the area where the hammer meets the pile with air. The system monitors the water level inside the pile sleeve, preventing water blows and associated energy loss
Environmentally-friendly. A closed loop hydraulic system minimises the risk of oil emission and biodegradable oil is used