Bottom Driven Steel Cased Piles — Specialists Since 2005

Bottom driven steel cased piles are what we do best. At Advanced Mini Piling Systems, steel cased bottom driven piling is not a sideline — it is our primary specialism, refined over 20 years and across hundreds of projects throughout South West England and the Midlands. We install bottom driven steel cased piles from 65mm to 323mm diameter, with safe working loads up to 500kN, and we complete them faster than any competitor in our region.

We build our own piling machines in-house through our sister company Noakes Engineering — which means lower costs, higher quality, and machines engineered specifically for the way we work. Our automatic free-fall hammer system runs continuously throughout the working day, delivering a consistent blow rate that a manually operated rig simply cannot match. Combined with 3-metre tube sections, group driving methodology, and a 6-metre mast that lifts the hammer clear of a welded section without stopping to reposition — the result is bottom driven steel cased pile programmes completed significantly faster than any competitor in our region.

Our in-house built automatic free-fall hammer system running on a civil engineering project — consistent, continuous output throughout the working day with no downtime between piles.

What Are Bottom Driven Steel Cased Piles?

Bottom driven steel cased piles consist of a thin-walled steel casing driven progressively into the ground using an internal drop hammer or pneumatic Grundomat — a percussive mechanism acting from inside the base of the pile. Unlike top-driven methods, the driving energy is applied at the toe — displacing the ground cleanly and efficiently with no spoil brought to the surface.

The pile is started with a closed-ended starter casing driven to slightly above ground level. Open-ended follower sections are then welded on and the driving process repeated until the pile achieves a pre-determined set — either bearing onto rock, or developing the required load through skin friction in the surrounding soil. Once at design depth, the steel casing is filled with concrete and a reinforcement cage plunged into the wet concrete, connecting the pile head to the ground beams above. The result is a clean, watertight, load-bearing pile with no spoil, no mess and no disposal costs.

Bottom driven steel cased pile installation — waterfront civil project, South West England

Steel cased bottom driven piles cut to level and ready for capping beam — waterfront development

When Are Bottom Driven Steel Cased Piles the Right Solution?

Bottom driven steel cased piles are the preferred foundation method in the following situations — and the ones we are asked to deliver most frequently:

• Poor or variable ground conditions: Steel cased bottom driven piles are driven through soft, unstable or variable upper strata until they reach competent load-bearing ground — ideal for made ground, soft alluvial deposits, waterfront silts and variable brownfield fills.
• Restricted or low-headroom access: Our bottom driven piling rigs pass through a standard doorway and operate up to 50 metres from the power pack via umbilical hoses — reaching spaces where no full-size rig can work.
• Contaminated sites: No spoil is generated during installation. The ground is displaced, not excavated — eliminating disposal costs and keeping hazardous material contained.
• Waterfront, civil and marine projects: We have extensive experience of steel cased bottom driven piling on riverbank, harbour, jetty and bridge projects — including working from temporary decking on tidal sites.
• Noise and vibration-sensitive areas: Our Grundomat air-driven system produces very low noise and minimal vibration, making it suitable for occupied buildings, listed structures and conservation areas.
• Domestic extensions, conservatories and garden rooms: For smaller residential projects, our 65mm–150mm Grundomat system provides a fast, economical solution with minimal disruption to the property.
• Commercial and civil construction: Our 150mm–323mm bottom driven steel cased pile range carries safe working loads up to 500kN — suitable for bridges, substations, industrial units, retail and roadside structures.
• Tight programmes: We regularly complete bottom driven steel cased pile contracts significantly faster than competitors — the result of our automatic free-fall hammer system, 3-metre tube sections, group driving methodology, and a 6-metre mast that keeps the rig moving without stopping to reposition. No idle time, no downtime between piles.

Grundomat System — Steel Cased Bottom Driven Piles 65mm to 150mm

Steel cased bottom driven pile installation at a residential site in Somerset — our compact tracked rig works in gardens and restricted spaces inaccessible to standard piling equipment

For bottom driven steel cased piles up to 150mm in diameter, we specialise in the Grundomat system — an air-driven percussive hammer that acts from inside the base of the pile casing. The Grundomat sits within the starter casing, which has a crimped point on one end and a collar on the other. It drives the casing downward from inside, with follower sections welded on until the pre-determined set is achieved. The air supply is fed from distance via hose, causing very little disruption on site and requiring no piling rig.

Key advantages of the Grundomat steel cased bottom driven pile system:

• No piling rig required — the most compact and mobile bottom driven pile solution available
• No spoil removal — the ground is displaced, not excavated
• Minimal vibration and low noise — suitable for occupied properties and sensitive sites
• Ideal for domestic extensions, orangeries, garden rooms, conservatories and porches
• Air supply hose operates up to 50 metres from the compressor
• Most residential bottom driven steel cased pile projects completed in one to two days

Larger Steel Cased Bottom Driven Piles — 150mm to 323mm

Bottom driven steel cased piling rig in restricted access between existing buildings — waterfront commercial project

Multiple bottom driven steel cased piles installed — commercial waterfront development, South West England

For projects requiring greater load capacity, we install steel cased bottom driven piles from 150mm to 323mm in diameter, carrying safe working loads up to 500kN. Our diesel/electric hydraulic drop hammer rigs are mounted on a trailer and feed the piling head via umbilical hoses — allowing the rig to operate up to 50 metres from the power pack and pass through a standard doorway.

Bottom driven steel cased piles are driven through soft upper strata with follower sections welded on progressively until the pile achieves the required depth on friction or bears onto rock. The completed bore is clean and watertight, ready to be concreted from above or grouted from the pile base, with reinforcement installed to connect each pile head to the ground beams.

Steel Cased Bottom Driven Pile Sizes and Safe Working Loads

Civil, Waterfront and Marine Steel Cased Bottom Driven Piling

Steel cased bottom driven pile installation at a riverside site in Devon — drop hammer rig in operation

Bottom driven steel cased piling from temporary jetty decking — specialist waterfront foundation work

We have significant experience of steel cased bottom driven piling on waterfront, riverbank, harbour, jetty and civil engineering projects — including working from temporary decking on tidal sites, alongside existing structures, and in severely restricted access conditions. Our compact equipment and in-house engineering capability make us one of the very few contractors able to deliver bottom driven steel cased piles in locations where conventional plant cannot operate.

Steel cased bottom driven piling on a bridge deck — civil engineering project, South West England

Why Choose Us for Bottom Driven Steel Cased Piles?

Bottom driven steel cased piling alongside a historic stone building at a waterfront site — precise, low-vibration installation in a sensitive location

• Specialists, not generalists: Steel cased bottom driven piling is our primary specialism. Every investment we make — in machines, training and technique — is focused on making us the best at this one method.
• Faster by design, not by chance: Our speed advantage comes from the machines themselves — an automatic free-fall hammer that runs continuously without stopping, 3-metre tube sections that reduce the number of welds per pile, group driving that keeps the rig always in use while welding happens on the previous pile, and a 6-metre mast that lifts the hammer clear of a welded section without repositioning. We regularly complete contracts in half the time competitors quote.
• In-house machine building: We manufacture our own bottom driven piling rigs through Noakes Engineering. Higher quality, lower cost, and machines designed specifically for the access challenges our work demands.
• Established since 2005: Over 20 years of steel cased bottom driven piling experience. We have worked in every ground condition and access constraint the South West presents.
• Restricted access is our core strength: Our rigs pass through a standard doorway, operate 50 metres from the power pack, and reach locations no standard piling contractor can.
• Zero spoil — zero disposal cost: Bottom driven steel cased piling displaces the ground rather than excavating it. Nothing comes to the surface — no spoil, no contamination risk, no disposal bill.
• Full engineering support: We work alongside your structural engineer on pile design and can arrange site investigation where required, delivering a complete and coordinated foundation package.

Steel cased bottom driven piling rig mobilised on a commercial development site — South West England

Sectors We Serve

Frequently Asked Questions — Bottom Driven Steel Cased Piles

Related Services

• Bored Piles — a low-vibration alternative where ground conditions suit an auger method
• Screw Piles — fast installation with immediate load capacity, ideal for lightweight structures
• Piled Foundations — complete foundation packages including ground beams and capping beams
• Basement Construction & Piled Retaining Walls — specialist below-ground solutions