Widening Construction Technology of Some High Fill Subgrade

The connection of new and old expressway network causes widening of new and old subgrade, treatment problem of widening strip,in particular,in mountainous heavy hilly area of southwest China, widening strip of more new and old subgrade is located in high fill subgrade section. The authors introduce construction method of new and old high fill subgrade,including stability calculation of high slope,problem analysis in construction,construction scheme for widening section of high fill subgrade, which ensure engineering quality in the binding site of new and old high fill subgrade.