Underpinning

Hazard Related Topics

Introduction

This topic includes mass concrete, pier and beam, pile and beam and mini-piling.

Structural instability leading to possible collapse of the structure and the resultant risk to workers and occupants.
Work in confined spaces preventing the use of mechanical lifting aids and leading to manual handling problems whilst lifting and moving casings, reinforcement, trench sheets and concrete.
Health hazards from contaminated risings or ground water, cement, concrete, fumes and dust.
Health hazards caused by noise, vibration and fumes.
Hazards of contact with buried or overhead services whilst drilling, driving, impact settlement and vibration.

Plan to control ground water inflow.
Ensure location of underground and overhead services is known and marked before work commences.
Examine possibility of repairing and strengthening structure to avoid need for underpinning.
Ensure suitable protective clothing and equipment is provided and used.
Ensure adequate batter or shoring is provided for trenches.
Ensure adequate ventilation in confined spaces.