Underpinning techniques can protect structures near demolition work
Underpinning techniques can be an important part of the demolition process – not on the building being brought down, but on surrounding structures.
According to newly updated guidance from the Health and Safety Executive, uncontrolled collapse is a major risk during demolition work, and applies not only to the main structure due for demolition.
“The structural survey should consider … nearby buildings or structures,” the HSE advises.
“The method statement for the demolition should identify the sequence required to prevent accidental collapse of the structure.”
In practice, this is one of the fundamental stages in any demolition work, and the HSE adds that structural engineers should assess the entire site before any work is allowed to begin.
Where any concerns are raised about nearby buildings, underpinning techniques may be used to ensure they remain stable from their foundations in the face of any vibrations as their neighbouring structure is brought down.
Underpinning can also restore some strength to structures that have shifted during heavy nearby construction or demolition work – allowing you to make them usable once again if the initial survey did not identify the problem of them becoming damaged.