The uneven settlement of the upper soil mass and the soil mass on both sides of the rigid structure buried under the embankment will often produce excessive additional pressure on the top of the structure. The vertical earth pressure coefficient can reach 1.2, or even 2.0 when the fill is high, that is, there is stress concentration on the top of the structure, resulting in cracking and destruction of the underground structure.

During the filling process of EPS embankment, attention must be paid to the connection between EPS and general filling sections. A transition section shall be set at the longitudinal connection section of EPS and soil embankment, that is, the EPS block shall be connected with the soil embankment in the form of steps, and the same is true in the transverse direction. At the same time, the EPS block shall be paved in a crisscross manner in the longitudinal and transverse directions, so as to facilitate the continuous stress and deformation of the EPS block.