ABSTRACT
This chapter deals with the various major construction methods. Starting with a description of the execution of earth structures, it then goes on to cover the techniques used to accelerate consolidation and limit deformation respectively. Each method of construction affects stability, settlement and construction time. The construction methods are then compared and the cost aspects examined. Insofar as the settlement process is concerned, phased filling merely prolongs the process. The reduction in excess pore water pressure after each fill layer must be large enough to develop adequate shear strength to maintain internal equilibrium upon application of a subsequent layer. The main reason for discouraging the displacing method is therefore the very real prospect of substantial differential settlement. In principle, cunettes are carried out with a view to substituting poor load bearing and highly compressible strata with sand with a view to reducing residual settlements and improving stability.
