依托某土工格栅反包面板加筋路基变形破坏的工程实例,考虑反包面板的特殊性,采用有限差分软件FLAC3D研究了填土压实度和加筋层间距对加筋路基变形的影响,并探讨了土工格栅反包加筋土路基的变形特性.模拟结果表明:加筋路基的沉降差异、侧向变形、加筋内力均随填土压实度的减小而增大,且随土工格栅层间距的增大而增大,施工中应注意控制边缘处填土的压实度和下部加筋的间距;在路基加筋区域和非加筋区域交界附近存在较明显的差异变形;土工格栅反包面板加筋土路基的潜在破裂面偏向土体内部发展.%Based on a geogrid reinforced roadbed with wrapped-around facing,and considering the particularity of wrapped-around facing,we study the influence of backfilling compaction and vertical spacing of the geogrid on the reinforced roadbed deformation by FLAC3D.Meanwhile the performance of geogrid reinforced roadbed with wrapped-around facing is discussed.It is concluded that the differential settlement,lateral deformation of the reinforced roadbed,and the tensile force of geogrid all increase when the compaction of backfill get worse and the geogrid spacing increases,so it is suggested to control the soil compaction at edge area and moderately reduce the geogrid spacing at lower elevation.There is obvious differential deformation in the conjunct area of reinforced and unreinforced regions.For the geogrid reinforced roadbed with wrapped-around facing,the critical failure plane develops toward the inner of the backfill body.
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