Research on Settlement Difference of New and old Roadbed in Municipal Road Reconstruction and Expansion Project
Taking a municipal road expansion project in Shenzhen as an example,this paper compares and analyzes the settlement difference between the new and old roadbed in the expansion project,and deeply explores the influence of different factors on the settlement value and transverse slope ratio of the new and old roadbed.The practice shows that the bench excavation method has a better control effect on the differ-ence of settlement and transverse slope ratio between the new and old subgrade.The influence of the new subgrade on the old subgrade decrea-ses with the decrease of the excavation slope.With the increase of road widening width,the center settlement of old road and the maximum set-tlement value of new road show a trend of increasing.In the early stage of soft soil foundation treatment,the improvement effect of strengthening measures is more obvious,and strengthening the compressive modulus of the foundation is an effective way to control the uneven settlement of the new and old roads.
Municipal roadRoad reconstruction and expansionSubgrade settlementSoft soil foundation
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