What is Excavation?
Excavation is the process of moving earth, rock or other materials with tools, equipment or explosives. It includes earthwork, trenching, wall shafts, tunneling and underground. Excavation has a number of important applications including exploration, environmental restoration, mining and construction.
Excavation is used in construction to create building foundations, reservoirs and roads. Some of the different processes used in excavation include trenching, digging, dredging and site development. Each of these processes requires unique techniques, tools and machinery to get the job done right. The processes used will depend upon the structure that will result from the construction process.
What is Demolished?
Demolished is the tearing-down of buildings and other structures. It contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for re-use.
For small buildings, such as houses, that are only two or three stories high, demolished is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rock-breakers attached to excavators to cut or break through wood, steel, and concrete. The use of shears is especially common when flame cutting would be dangerous.