ABSTRACT
This chapter evaluates specific design issues related to the vertical expansion of this site with emphasis placed on providing simple reliable methods for designing the liner and cap systems. The incorporation of a synthetic liner system on a slope overlying existing refuse made it necessary to consider design aspects for the liner system that may be commonly required when designing landfills on stable soil or rock slopes. Analysis and design of this landfill facility identified the following critical issues concerning vertical landfill development: Total settlement is comprised of: settlement due to the weight and decomposition of the existing refuse itself; and the weight of superimposed surcharge loading from additional overlying new refuse. The interface liner system represents the most critical plane in the landfill since it contains the weakest planes, with regard to stability. Based on these assumptions, the maximum additional tension that could be introduced into the liner system without straining it beyond 10% was 2100 kg/m.
