Study on the Geogrid Reinforced Soil Retaining Wall of Concrete Rigid Face by Field Test

Abstract

The field test of moulding concrete rigid panel faced geogrids reinforced soil retaining wall is done in the Gan (Zhou)-Long (Yan) railway main line of China. The basement vertical pressure of reinforced soil retaining wall is non-linear along the reinforcement length, and the maximum value is at the middle of the reinforcement length, moreover the value reduce gradually at former and bottom. The testing lateral pressure of the reinforced soil wall is non-linear along the height and the value is less than the active lateral earth pressure. The distribution of tensile strain along reinforcement at the upper wall is single peak value, but the distribution of tensile strain along reinforcement at the lower wall is twin peak value. The potential fracture plane at upper wall is similar to “0.3H method”, but the potential fracture plane at lower wall is near to the active Rankine earth pressure theory. The position of the maxmium lateral displacement of the wall face during construction at lower wall, moreover the position of the maxmium lateral displacement of the wall face after construction at top of the wall.