ABSTRACT
This chapter deals with the influence of wall stiffness and bracing on movements and the parametric studies of wall movements carried out by some investigators.
In a multibraced wall, the effects of the wall and prop stiffnesses on movements and bending moments depend very much on the sequence of excavation and the sequence and timing of installing the bracing. Since it may neither be possible to define such parameters precisely nor to model the boundary conditions accurately, theoretical analyses and parametric studies often provide a valuable means of identifying, rationalizing and understanding the performance of an excavation at its various stages. This is dealt with later on in the chapter. However, the information obtained from instrumentation and back analyses of well-documented case histories can be invaluable in enabling predictions of ground movements to be made with a certain degree of confidence.
