Purpose of Program Review. Program Review is a systematic way to assess the quality of SIUE's academic programs and determine ways to improve the quality of education, scholarship, and service.
Sheeting means the members of a shoring system that retain the earth in. position and in turn are supported by other members of the shoring system. See. figure 2.0. Shield (Shield system) means a structure used in an excavation to withstand. cave-ins and which will protect employees working within the shield system.
In 1818, Marc Brunel, a French engineer, invented a device that enabled workers to tunnel under rivers without having mud and water ruin their efforts. His tunnel shield was a rectangular cast iron wall with dozens of small shutters. Workers opened the shutters one at a time and dug out a few inches of dirt. Then the whole shield was pushed forward using screw jacks.