RESEARCH ON GEOGRIDS REINFORCED SOIL RETAINING WALL WITH CONCRETE RIGID FACE BY FIELD TEST

The field test of geogrids reinforced soil retaining wall with concrete rigid face is done in the Ganzhou— Longyan Railway main line of China.The test includes the measurement of the basement pressure and lateral pressure of the reinforced soil wall,the tensile force of the reinforcement and the lateral horizontaldisplacement of wall.The basement vertical pressure of the reinforced soil retaining wall is nonlinear along the reinforcement length;and the maximum value is in the middle of the reinforcement and reduces gradually to the two ends.The testing lateral pressure of the reinforced soil wall is nonlinear along the height and the value is less than the active lateral earth pressure.The tensile strain along reinforcement at the upper wall is a distribution of single peak,but the tensile strain along reinforcement at the lower wall is twin peak values.The potential fracture plane at upper wall is similar to0.3 Hmethod;but the potential fracture plane at lower wall is near to the active Rankine earth pressure theory.The maximum lateral displacement of the wall face during construction is at lower position of wall;and the maximum lateral displacement of the wall face after construction is at top of the wall.These test results can be used for references in future studies and designs of geogrids reinforced soil retaining walls.