Title 2 teaser with the key word soldier pile walls
The set-up of the project may not allow for sloping and so as to not destablize adjoining plots, roadways or networks. In this case, it is essential to support the walls via excavation. The support is often determined by the nature of the terrain, the presence of water, the surrounding risks, the hight of excavation.. One of the most popular and frequent choices of support for these subsoil projects is certainly the soldier-pile or ‘berlin’ wall.
This technique means preserving the ground directly before earthworks. The principle idea is to carry out from the surface, before any digging, a support area: pile, molded or prefabricated post. This ensures the equilibrium of active and passive earth pressures. These latter can be dark (supported at the head), vibro-dark (by vibration and support), beaten (percussion in profile) or bored (bored beforehand with profiles implemented afterwards).
The choice of the method depends on the density of the soil, the space available and the common areas to be preserved (vibrations).
The following step is to excavate, by horizontal slices, a few meters of ground and place some struts to hold it, or using tie rods via the vertical supports already in place and finally the shoring of the banks between the vertical supports.
It should be stated that the horizontal slices can be several and the shoring between the vertical supports can be carried out according to different procedures (thin concrete poured at the location or prefabricated, wooden planks or beams, metal planks, sprayed concrete).
In summary, the soldier-pile or ‘berlin’ wall can be described as benchmark form of support. It is so-called because it has been used frequently in Berlin.
Until the present day, the support is generally a metallic profile implemented by boring. The profiles are spaced at several meters. This support is often provisional in character.