Discussion on refined design of expressway reconstruction and extension narrow span project
With the narrow spell renovation and expansion project as the background,the application of foam-light soil subgrade and wide retaining wall in narrow subgrade reconstruction and expansion project is discussed.This paper expounds the function of combined base pavement structure with long life to improve the durability of highway and creatively carries on the differential design of pavement structure to meet the needs of road function and save engineering investment.For the section facing the water,the pile-plate structure is creatively used to span the width to reduce the impact on the environment.