Finite element model evaluation of barrier configurations to reduce infiltration into waste disposal structures: Preliminary results and design considerations

Barriers to reduce infiltration into waste burial disposal structures (trenches, pits, etc.) may be required to adequately provide waste confinement. The preliminary engineering design of these barriers should consider interrelated barrier performance factors. This paper summarizes preliminary computer simulation activities conducted to further engineering barrier design efforts. Several barrier configurations were conceived and evaluated. Model simulations were conducted for each barrier configuration using a finite element computer code. Results of this preliminary evaluation indicate that barrier configurations, dependent on their morphology and materials, may significantly influence infiltration, flux, drainage, and storage of water through and within waste disposal structures