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Finite element techniques are used to model two reintorced soil walls with different methods of construction, a full-height panel wall and an incremental panel wall. The results, in terms of lateral pressures and distributions of load and strairt along the reinforcements, are compared with experimental data obtained from large instrumented reinforced soil walls using geogrids. The comparison highlights the effects of compaction and the resulting locked-in strains in the geogrid and the importance of taking these into account when simulating the construction effects in the finite element model.