What is the main hazard when working in an excavation?
Every year people are killed or seriously injured by collapses and falling materials while working in excavations. They are at risk from: Excavations collapsing and burying or injuring people working in them; material falling from the sides into any excavation; and.
What are the hazards in excavation?
The greatest risk in an excavation is a cave-in. Employees can be protected through sloping, shielding, and shoring the excavation . A competent person is responsible to inspect the excavation . Other excavation hazards include water accumulation, oxygen deficiency, toxic fumes, falls, and mobile equipment.
What is the greatest risk with excavations?
Dangers of Trenching and Excavation Cave-ins pose the greatest risk and are much more likely than other excavationrelated accidents to result in worker fatalities. Other potential hazards include falls, falling loads, hazardous atmospheres, and incidents involving mobile equipment.
Which of the following are common types of caught in and caught between hazards?
“ Caught in- between ” hazards kill workers in a variety of ways. These include: cave-ins and other hazards of excavation work; body parts pulled into unguarded machinery; standing within the swing radius of cranes and other construction equipment; caught between equipment & fixed objects.
What are the methods of excavation?
There are number of excavation methods which are used for deep foundation construction such as full open cut method , bracing excavation , anchored excavation , island excavation methods ,zoned excavation , top down construction methods etc. These excavation techniques are discussed.
What are the safety precautions in excavation work?
Excavation safety Precautions : Adapting soil protection method like stepping, sloping, shoring and close sheeting. If excavation reached more than 3 meter, shoring or close sheeting shall be done. Adequate barricade and excavation sign board. Gas test inside excavation before job .
Is fire a hazard associated with excavations?
If you are not using protective systems or equipment while working in trenches or excavations at your site, you are in danger of suffocating, inhaling toxic materials, fire , drowning, or being crushed by a cave-in.
How many types of excavation are there?
16 different types
Why are excavations important?
Excavations can be classified, from the point of view of their purpose, as planned, rescue, or accidental. Most important excavations are the result of a prepared plan—that is to say, their purpose is to locate buried evidence about an archaeological site.
What are 3 main protection methods against cave ins?
To prevent cave – ins : SLOPE or bench trench walls. SHORE trench walls with supports, or. SHIELD trench walls with trench boxes.
How deep can you dig before you need shoring?
What is the more expensive and difficult method of shoring?
The most expensive trench support methods are shoring methods such as soldier piles, sheet pile, or modular shoring . 3. Soil conditions: Open cut can be made in most soil conditions where ground water can be handled. Slow seepage usually does not cause a trench to become unstable.
Is ergonomics a hazard?
Ergonomic hazards are physical factors in the environment that may cause musculoskeletal injuries.
What is the best way to protect yourself from getting caught in power tools?
Never carry a tool by the cord or hose. Never yank the cord or the hose to disconnect it from the receptacle. Keep cords and hoses away from heat, oil, and sharp edges. Disconnect tools when not using them, before servicing and cleaning them, and when changing accessories such as blades, bits, and cutters.
What is a struck by hazard?
Struck -by injuries occur when a worker comes into forcible contact with a flying, falling, swinging or rolling object. Of the Fatal Four hazards , struck-by hazards are the second highest cause of fatalities among construction workers.