PIL/Types/TBT-PIL-008

Mini Piling Safety

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Mini Piling Safety

Toolbox Talk Record

Ref: TBT-PIL-008  |  Issue: 1  |  Date: March 2026
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What?

  • Mini piling uses small rigs to install piles in restricted access areas where conventional rigs cannot operate.
  • Common applications include underpinning, basement works, internal strengthening, and work near existing structures.
  • Mini piles are typically 150mm to 300mm diameter, installed by rotary drilling, driven, or augered methods.
  • Despite their smaller size, mini piling rigs weigh several tonnes and have rotating parts that cause entanglement.
  • Grouting operations involve pressurised cement grout that can cause burns and injection injuries on contact.
  • Working in confined internal areas creates noise, dust, and fume hazards that require additional ventilation.
  • Overhead clearance is often limited; operatives risk head injuries from low beams and existing structures.
  • The piling rig must be set up on a stable base even when operating inside buildings or basements.
  • Underground services must be located before drilling at every pile position, even inside existing buildings.
  • PUWER 1998, LOLER 1998, and the Control of Noise at Work Regulations 2005 apply to mini piling.

Why?

Entanglement injuriesMini piling rigs have exposed rotating augers, drill rods, and hydraulic parts that catch clothing and cause fatal entanglement.
Restricted space hazardsWorking inside buildings with limited ventilation, low headroom, and poor access amplifies noise, dust, and fume exposure.
Service strikesBuildings contain hidden services in floor slabs and foundations. Drilling without scanning causes gas leaks and electrocution.
Do Don't
  • Scan for buried services at every pile position before drilling begins.
  • Set up the rig on a stable, level base even in confined internal locations.
  • Guard all rotating parts on the rig including augers and drill rods.
  • Provide forced ventilation when operating mini piling rigs inside buildings.
  • Wear hearing protection, eye protection, and hard hat at all times.
  • Establish an exclusion zone around the rig during all drilling operations.
  • Use dust suppression or extraction when drilling in enclosed areas.
  • Check overhead clearance before positioning the rig to prevent head injuries.
  • Wear close-fitting clothing that cannot be caught by rotating machinery.
  • Brief the team on the grouting procedure and grout burn first aid.
  • DON'T drill at any pile position without confirming service clearance first.
  • DON'T reach near rotating augers, drill rods, or hydraulic components.
  • DON'T operate the rig on unstable or uneven ground without proper levelling.
  • DON'T work in confined internal areas without forced ventilation in place.
  • DON'T wear loose clothing, jewellery, or gloves near rotating rig parts.
  • DON'T enter the exclusion zone around the rig while drilling is in progress.
  • DON'T ignore the low headroom hazard; check clearance before every rig move.
  • DON'T allow grout under pressure to contact unprotected skin or eyes.
  • DON'T operate the mini piling rig without current PUWER inspection records.
  • DON'T assume internal building locations are free from underground services.

See also: Piling Safety Awareness | Piling Platform Requirements
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