What is braced excavation used for?

Braced excavation is used in construction and utility work where a hole being dug is taller than four feet to prevent the sides from collapsing onto the workers, or any other project that requires a reinforced sidewall in an excavation. This can mean anything from unstable soil that needs support to the digging of an underpass on the freeway, and even mining. This is a very broad concept, but the aim of every braced excavation is the same; to prevent the collapse of the excavated soil. Braced excavation creates a safe and stable work site for workers, and also prevents unnecessary collapses of holes due to rain and unstable soil.

There are many ways a project can be considered braced excavation, and technically any hole dug and then braced to prevent collapse can be called such. The most common form of this and the one that people are most familiar with is the technique used by construction and utility workers. You may have seen the large metal structures that look like huge shoe boxes with no ends, top or bottom. These are placed in large holes dug with excavators so that workers can go into the hole and work without the hole collapsing and burying them alive, That is just one of many forms of braced excavation used today. Tunnels and underpasses can also be considered a braced excavations because the sides are reinforced to prevent collapse. Mining is also a form of braced excavation because the tunnels are reinforced with wood or steel to prevent collapse.