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.

EPS construction does not require special machinery, but can be carried out manually. It is fast and suitable for emergency rescue and disaster relief. It is more suitable for places where large machinery is difficult to use. It can be processed and cut on site to meet the requirements of the site terrain.