Model tests in two dimensional model ground, which is free from the effect of wall friction of sand box, are needed to know the deformation characteristics of a subsoil structure as a sheet pile wall. In this research, the model tests on anchored sheet pile walls and cantileber type sheet pile walls are examined in two dimensional model ground made of layered aluminium bars. The box used for this series of test is L150cmxH50cmxD15cm in scale, minimum embedded length of sheet pile is 25cm, the maximum difference of height of both ground level is 30cm. The earth pressure acting on the sheet pile wall, subgrade reaction, and the deformation of surrounding ground are focused in this research. The effect of the difference of the construction method of making the difference of the ground level such as dredging type and reclamation type is also focused in this research. Mainconclusions are as follows ;
1) The difference of the earth pressure acting on a sheet pile wall is small by the different construction method as dredging type or reclamation type.
2) The earth pressure acting on a sheet pile wall from the back side is not a pure triangle shape as considered in the ordinal design, but the maximum earth pressure strength is appeared in the middle height and zero earth pressure is appeared on the bottom of the standing wall.
3) The subgrade reaction model used for a cantilever type sheet pile wall should be P=khxy0.5 as the same as the subgrade reaction model used in the pile design.
4) Both subgrade reaction models used for anchored sheet pile wall as P=Khxy and P=Khxy0.5 are fit to estimate the deformation characteristics of a sheet pile wall.