In what type of soil is a trench box most likely used?

A trench box is specifically designed to protect workers in trenches dug below the surface, and it is particularly beneficial in certain soil types. Sandy soil is often loose and can collapse easily when excavated, which increases the risk of cave-ins. The use of a trench box in sandy soil helps provide a safe working environment by supporting the trench walls and preventing them from collapsing.

While clay and loamy soils also require some level of support due to their properties, sandy soil presents a unique challenge where the risk of sudden collapse is higher due to its granular nature. Rocky soil typically does not necessitate a trench box, as it tends to hold its shape better, and the excavation process in such soil can be quite different. Therefore, the trench box is primarily utilized in sandy soil to enhance safety and stability during excavation work.