1912929
Description
Mind Map by Yasir Kayani, updated more than 1 year ago
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Created by Yasir Kayani
about 9 years ago
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Excavation
- hazards
- materials falling onto people working in the excavation
- people being struck by plant
- people & vehicles falling into excavation
- undermining nearby structures
- contact with underground services - gas/electricity
- ingress of water
- fumes from vehicles/plant (co2)
- methane/other gases
- contaminated land
- lack of oxygen
- biological hazards e.g. leptospirosis, drains/sewers, rubbish and waste
- materials falling onto people working in the excavation
- control measures
- supported exceptions with timber
- trench boxes
- services supported
- tied ladders for access
- batter or bench sides of excavation
- spoil stored away from sides of excavation
- signs and barriers/edge protection
- PPE e.g. hard hats/high vis clothing
- keep vehicles
away/use stop
blocks
- trained and competent plant operators
- temporary support for nearby structures if needed
- backfill or cover excavation
when not being worked on
- supported exceptions with timber
- undergorund services
- look around for obvious signs of underground services e.g. drains, patching of surface etc.
- use cable locators to trace any services. mark the ground accordingly
- use services plans provided by utility company - these are only a guide
- get cables isolated and made dead before work begins if possible
- dig trial holes by hand - use shovels and spades, not fork and picks
- hand dig if in doubt (particularly
for plastic cables which cannot be
detected)
- have emergency procedures/contact in place
- look around for obvious signs of underground services e.g. drains, patching of surface etc.
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