The liquefied embankment foundation of a reservoir is simulated by using FLAC 3D software; the reinforcing effect of the high pressure circular jet grouting diaphragm wall is estimated; the reliability and reasonableness of the reinforcing scheme through high pressure circular jet grouting diaphragm wall are verified. From the analysis there is trend of liquefaction in the embankment foundation

and lateral deformation will occur in soil; therefore it is necessary to reinforce the embankment foundation. The high pressure circular jet grouting diaphragm wall is suitable for reinforcing the constructed reservoir

safety of the reservoir can also be guaranteed because stress and deformation of the liquefied embankment foundation are in the permittable limit. Technical information can be provided for maintaining and reinforcing the constructed hydraulic projects.