Drilling System

The overburden drilling system revolutionises the process of creating stable foundations in challenging ground conditions. Utilising a percussive drilling method, this system efficiently advances a durable steel casing through layers of overburden soil.

By effectively casing the pile as it progresses, the system ensures the integrity of the pile shaft and prevents collapse or contamination from surrounding materials. This enables the seamless transition to the stable rock strata beneath, facilitating the formation of a rock socketed pile. As a result, structures can be securely anchored in even the most difficult terrain, providing reliable support and stability for a wide range of construction projects.


ODEX, short for Overburden Drilling EXentric, is an approach to pile construction tailored for demanding ground conditions. This innovative technique encompasses percussive drilling and casing methodologies, offering a versatile solution for navigating through challenging ground conditions. Whether confronted with soils consisting of cobbles, boulders, or layered rock formations, ODEX excels in maintaining efficiency and structural integrity.

Its adaptability extends to traversing mine workings and fractured or laminated rock, making it a preferred choice for projects requiring robust foundation solutions. By seamlessly integrating drilling and casing processes, ODEX ensures precise pile placement and stability, even in the most inhospitable environments, facilitating the successful completion of diverse construction projects.

piling rig


ODEX piles represent a sophisticated method of foundation construction, characterised by their robustness and adaptability to various ground conditions. The process commences with the insertion of a steel casing into the ground, achieved through a combination of drilling and hammering techniques (rotary-percussive). This task is executed using a powerful down the hole hammer and over reaming drill bit, renowned for its ability to penetrate through most obstructions with relative ease, ultimately reaching solid rock formations. Once the casing reaches the desired depth, the drilling operation can transition seamlessly into the rock, creating an open hole for further reinforcement.

Subsequently, concrete is poured into the borehole, filling the void, and providing structural stability and allowing the transfer of load from the structure through the overburden and into bedrock . To enhance its structural capacity, a steel reinforcing cage is installed within the concrete mass. At this stage, the steel casing can either be extracted from the ground, leaving behind a reinforced concrete column, or it can be left in place, depending on the project requirements and geological considerations.

This process ensures the creation of durable and reliable foundation elements capable of withstanding the demands of various construction projects, from infrastructure developments to high-rise buildings. The versatility and effectiveness of ODEX piles make them a preferred choice for engineers and contractors seeking efficient and resilient foundation solutions in challenging ground conditions.

WHY USE Overburden Drilling System?

  • Suitable for all soil types
  • Ability to drill through most obstructions and socket into rock
  • Can support high loads
  • Bespoke geotechnical drawings
  • Minimum vibration
  • Various diameters available


We successfully deliver projects to the highest standard, safely, on time, within budget, and with care for the environment and communities. Clients choose RB time and time again thanks to our proven track record.

All products are manufactured to BSEN, ISO, and CE accreditation. We are committed to ensuring we continuously deliver high quality, robust service, and product to our clients. At RB we continuously review and access where we can further improve.

We are proud to be recognised and awarded the RoSPA gold award for the sixth year running for the exceptionally high standards towards the health and safety of our employees.


RB Breakfast Club

Apply for an invite to our breakfast club events

  • This field is for validation purposes and should be left unchanged.