is defined as the excavation of all hard, compacted, or cemented materials that require blasting or the use of ripping and excavating equipment larger than defined for common excavation. Excavation definition is - the action or process of excavating. All work regarding the earthwork for a project. Recent Examples on the Web Following a recent plan review, ODOT decided to make the change, which will involve more excavation than was originally planned. It includes earthwork, trenching, wall shafts, tunneling and underground. So, these tie backs holds the excavation supports and they are grouted to the rock below the ground. Firstly by the type of material that is being excavated and secondly by the purpose of the excavation. Any major excavation or trenching job is dangerous and is best left to a professional crew. PROCEDURE.1 All excavation, earthwork and filling will be carried out in accordance with the specification detailed in the project contract documentation. In this case, tie back bars or anchor bars are installed in the soil cut that is behind the excavation support. The powerful heavy equipment, used to best advantage by a skilled operator, is a joy to behold. Excavation has a number of important applications including exploration, environmental restoration, mining and construction. Excavating and trenching both describe removing earth to create man-made open holes in the ground. The scope of the site work package can vary considerably, however the term “site work” normally references all excavation, backfill, etc. The earthworks created for such a purpose are often called the sub-grade or finished contouring (see diagram). Definition of Site work in Construction. Excavation can be classified in two ways. According to the U.S. Occupational Safety and Health Administration, the shape and depth of the hole determines whether the hole is an excavation or a trench. for the project. Excavation and embankment (cut and fill) Excavation = the removal of soil or rock from its natural location. Used to construct embankments and foundations, earth usually is easy to move with scrapers or other types of earthmoving equipment. Embankment = the placement and compaction of layers of earth or rock to form a roadbed of the planned shape, density, and profile grade. 2. The scope of the excavation job varies from digging footings for a small building to moving millions of cubic yards of earth. Various sections of a roadway design will require bringing in earth. Excavation is the process of moving earth, rock or other materials with tools, equipment or explosives. Rock excavation is removal of a formation that cannot be excavated without drilling and blasting. 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