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Vibro Stone Columns are a cost-effective ground improvement solution used to increase the bearing capacity and reduce settlement of weak or poorly compacted soils.
The technique involves installing compacted columns of graded stone into the ground, improving its engineering properties and providing an alternative to traditional piled foundations where ground conditions are suitable.
Vibro Stone Columns are installed using a vibrating probe, known as a vibroflot, mounted on a specialist rig. The probe penetrates the ground to the required design depth before graded stone aggregate is introduced and compacted to form a dense column.
Two principal installation methods are used, depending on ground conditions.
Top Feed Method
The vibroflot penetrates the ground to the required depth before being withdrawn to allow stone aggregate to be introduced from the surface. The probe is then reinserted to compact the stone in stages, forming a continuous column.
Bottom Feed Method
Where weak, unstable or water-bearing soils are present, stone is delivered directly to the base of the vibroflot through a purpose-built feed system. This allows columns to be constructed progressively from the bottom upwards, maintaining column continuity in challenging ground conditions.
Vibro Stone Columns provide an efficient ground improvement solution that can reduce reliance on traditional deep foundations, while offering potential savings in construction time, material use and overall project cost.
Quinn Piling provides Vibro Stone Column ground improvement solutions for commercial, industrial and infrastructure projects across Ireland and the UK.
Using specialist vibro equipment and installation monitoring systems, we can deliver ground improvement solutions tailored
to site-specific ground conditions and foundation requirements.
Our Vibro Stone Column capability includes:
Vibro Stone Columns offer an economical and efficient alternative to conventional deep foundations where ground conditions permit.
Key benefits include:
Vibro Stone Columns are commonly used where ground improvement can provide a suitable alternative to deep piled foundations.
Typical applications include:
Quinn Piling’s Vibro Stone Column systems can typically install columns to depths of up to 10 metres, with column diameters generally ranging from 300 mm to 1,000 mm, depending on ground conditions and installation method.
Column spacing, diameter and depth are designed to achieve the required bearing capacity and settlement performance for each project. Installation parameters are monitored using specialist data logging systems to support quality control and verify construction against the specified requirements.
Ground Improvement Case Studies
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