Abstract: It’s a great challenge to construct geogrid-reinforced soil embankments in steep high mountainous area with complicated topographic and geological conditions. The geogrid-reinforced embankment of 50m height built using discarded soil generated by tunnel excavation was analyzed to explore the engineering geological and hydrogeological problems encountered in the design and construction. By using limit equilibrium method, the stability of typical cross-sections of reinforced embankment was calculated, and different engineering measures corresponding to this project were compared and discussed. On the basis of the calculation results, engineering measures including crushed stone concrete piers, anchor bolts, and adjustment of the length and vertical space of reinforcing material were selected to increase the embankment’s stability and to control the differential settlement. The performance of embankment and the monitoring results indicated that the geogrid-reinforced embankment stand stable, and the adopted engineering measures work well as anticipated.

Key words: embankment, geogrid reinforced soil, stability, mountainous area, complicated terrain