stand-up time

construction

Learn about this topic in these articles:

In tunnels and underground excavations: Ground support
…timing support installation is so-called stand-up time—i.e., how long the ground will safely stand by itself at the heading, thus providing a period for installing supports. In soft ground, stand-up time can vary from seconds in such soils as loose sand up to hours in such ground as cohesive clay…
Read More