with an air percussion drill rig, the excavation of test trenches with a bulldozer with rippers or backhoe, and by geologic mapping.

Cave-in

Cave-in of an excavation is the detachment of the mass of soil in the side of the trench and its displacement into the hole, which represents a hazard to the person inside. Cave-ins are considered the largest risk when working within trenches. Cave-ins can be caused by a combination of pressure

1.Previous
3.Next