What a trench

Excavation is the soil that is obtained by excavation during excavation work on construction pit and excavation for piping, subsequently discharged to the sides or taken away.  Before the excavation is commenced, the location of the utility networks at the excavation site must be specified. This prevents them from being damaged during excavation work. Individual trenches dig through the figures when the main figure is a hollow part of the excavation dumbbed from the level of the work surface. The sub-figure is a trench excavated from the bottom of the main figure, such as the groove in the main building pit at the basement. The excavation is divided according to its shape and dimensions and is determined by the object. The walls of the trench must be secured by sloping, grafting or underground walls.  Types of excavation are pitches, building grooves, shafts. Individual trenches can be combined.