Trench Digging Digging trenches is one of the oldest types of work with both construction and excavating. Prior to World War 2, trenches were dug by hand. As workers dug the trenches deeper, the sides needed to be shored or supported, to keep the walls of the trench from caving in. Following the World War, several innovations were made in backhoes, and trench digging seemed to fade away as a profession. By 1950, hydraulically actuated backhoes were developed, which make it possible to rapidly dig very deep trenches. Resulting from the innovations with backhoes, and because there were no workers inside digging the trenches, the walls no longer needed to be shored. All types of trenches have what’s known as a stand up time. This time is the amount of time that elapses from the time the ditch is dug until the time the trench walls start to collapse. The stand up time is dependant on many factors, which include the type
To read more, add this article to the shopping cart.
Visit articlesdepot.co.za/Excavation-Equipment-articles/ for other articles in this category.