As a structure type of sheet-pile wall,the main pile with inserted sheet structure is composed of some certain members,the force condition of which is relatively complicated.Based on an engineering example,the NL method is utilized to compute lateral bearing capacity.In order to verify the reliability of theoretical method,a 3D pile-soil model is established by ABAQUS finite element analysis software to carry out numerical simulation.It is revealed that most of the load is carried by main pile,for inserted sheet,horizontal bending moment is much larger than the vertical one.Moreover,mechanical properties of the main pile with different inserted sheet size are studied based on ABAQUS,and the moment variation of the main pile is emphatically analyzed with the change of the inserted sheet width,thickness as well as embedded depth.The results indicate that force conditions of the main pile are greatly affected by the inserted sheet width,and the maximum mid-span bending moment of the main pile increases significantly along with the width.While inserted sheet thickness and embedded depth have less influence on the main pile.According to the actual need in engineering,appropriate adjustments can be made for the thickness or embedded depth.