Field Experiment Study of Geosynthetic Reinforced Soil at Bridge Approach (05-1669)
Guangle Feng, Hubei Department of Transportation, China
Rong Luo, Texas A&M Transportation Institute

To avoid bridge approach bumping at high embankment, this paper put forward a scheme of utilizing geosynthetics dealing with bridge approach roadbed, during construction, inspected some useful indexes such as backfills compactness, subgrade deflection, soil pressure, and settlement of roadbed, ect.. Their effects were very good, which indicated it’s an effective method to reduce differential settlement. The soil pressure indexes showed that GRS at bridge approach could generate ‘up-tuck-net-force’, and when the horizontal distance from inspecting point to the abutment was smaller, the ‘up-tuck-net-force’ was larger, and it could also illuminate that the geosynthetics should be disposed in smaller vertical space in the middle of the profile.