Abstract:
Grouting can be used in a variety of ways to protect structures and utilities from the deleterious effects of nearby construction activities. This paper reviews and compares the various ways grouting can be used to protect adjacent facilities including: acting as underpinning; stabilizing the ground to facilitate underpinning construction; stabilizing the ground to reduce displacements during construction and eliminate the need for underpinning; grout injection during construction to compensate for construction-related displacements; and injection of grout to restore a structure to its preconstruction elevation or to lessen structure distortions. Discussion will address the potential use of jet grouting, permeation grouting, compaction grouting and compensation grouting to protect structures, as well as potential advantages and challenges associated with the use of these various grouting methods to protect buildings and utilities. Case histories from several projects will be used to illustrate and support the points made in the paper.