Low To Medium Pressure Surface Preparation
Ultra High Pressure (UHP) Surace Preparation
Heat Exchanger Tube Cleaning
Pipe Cleaning & Flushing
Drain & Sewer Cleaning
Tank Cleaning
Hydro Abrasive Cold Cutting & Slurry Plastics
Concrete hydro demolition
Pile Driving Assistance
Under Water Maintenance

Waterjet Assisted Pile Driving
Driving and pulling of sheet pilings, Trench Sheets, tubular piles and Double sheet piles has been carried out for many years using Mechanical Methods such as pile drivers and Vibro Hammers.

Both the pile driver and the Vibro Hammers have technological disadvantages such as soil conditions and surrounding infrastructure.

Nowadays supporting systems have been added to assist in driving piles through difficult soil conditions and urban restrictions these supporting systems can be used to variable degrees to assist in driving piles by lowering the vibration, impact noise and speeding up the process. Water jetting has been successfully used for many years throughout Europe and more recently in the Middle East.

Hydroflow Pump Rentals have been involved in water jetted assisted pile driving in recent years in the Middle East. This has been generally due to the expansion of construction around the Gulf Area, such as new ports and jetties, along with reclamation areas for new housing infrastructures such as Palm Island’s in Dubai, Abu Dhabi, The Pearl in Qatar to name but a few.

The ground condition in the area along the coastal areas has proven problematic for driving both sheet piles and tubular piles for construction of harbours, ports, jetties and these new man made islands. These tough subterranean conditions have now been conquered by the use of water jetting as a supporting system for pile driving.
How the water jetting technique works.
High-pressure water jets are installed at the toe of the sheet pile via a high-pressure lance’s or tube’s. Various methods have been used with nozzles of a single jet or multiple jets.

The high-pressure jets are situated at various points of the pile dependant on the type of soil / ground conditions.

Softer materials such as clay, sand and harder material such as marle of the upper cretaceous, various dense soil types, bed rocks and cap rock have been water jetted to assist in pile driving.

Here in the Middle East, the variations of materials exist in several layers. Piling up to the depths of 25 meters deep have been carried out by Hydroflow assistance. It has been noted that up to 3-4 layers of hardened materials can be found in depths of minus 25 meters from sea level.

Due to the nature and density of the cap rock encountered, it is necessary to use high pressure water up to 8,000 psi ( 550 bars ) with flows up to 110 litres per minute per nozzle.( Sea water can be used )

The high-pressure nozzles are installed at the toe of the sheet pile. When difficult rock is encountered more nozzles are required with more flow.

Several high-pressure pumps are used in tandem to allow for efficient pile driving.

Trial pile drives are necessary to ensure that the correct methods, amount of pump units required and the most economic jetting systems are installed on the piles to be driven.

Sacrificial nozzles and lances have been used, this can prove costly to the piling contractor. Hydroflow can design the water jetting system to suit the projects encountered. Hydroflow systems can be designed to retrieve the nozzles and lances from each pile drive.

Hydroflow Pump Rental has successfully carried out (along with pile driving contractors ) more than 7,000 individual pile drives throughout the region.