The double-row steel sheet piles support structure has complex mechanical characteristics.In this paper

some computing methods of the double-row piles are mentioned at first

and the advantages and disadvantages are analyzed.Then

compared with the model test

the correctness of plaxis and the parameter settings were illustrated.And with the analysis of the calculation result of the finite element

the strong three dimensional space effect in the double-row steel sheet piles is emphasized.At last

the earth pressure of the proportional coefficient method is corrected

and the optimized double-row steel sheet piles distance is proposed.The conclusions of this paper can be used as references of similar projects in soft soil area.