Piling walls- are usually used in soft soils and tight spaces. A sheet pile wall is made out of steel, vinyl or wood planks which are driven into the ground. For a quick estimate the material is usually driven 1/3 above ground, 2/3 below ground, but this may be altered depending on the environment. A taller sheet pile wall will need a tie-back anchor, or "dead-man" placed in the soil a distance behind the face of the wall, that is tied to the wall, usually by a cable or a rod. Anchors are placed behind the potential failure plane in the soil.
There are a lot of softwares that can usually asses the type of sheet pile wall you need to use in order to design a good retaining wall,we recommend the following:
- Prosheet- a free comprehensive software for Cantilever and Anchored Sheet Wall Systems according to the Blum theory. The ProSheet 2.2 defines all the forces required for determing a sheet piling structure.
For the design of the head wall three static systems are possible:
- free earth support with one layer of anchor or struts
- fixed earth support with one layer of anchor or struts.
The anchor wall may be free-earth or fixed-earth supported.
The following loads are taken into consideration for the head wall as well as for the anchor wall:
- earth pressure behind the wall
- earth pressure in front of the wall
- water pressure behind the wall
- water pressure in front of the wall
- uniform infinite surcharges on the soil surface (Caquot)
- concentrated linear surcharges (max 5) at any location (Boussinesq)
- point forces at any location of the wall (Concentrated Forces)
- a pressure diagram on the back of the wall.
The program defines the design characteristics based on the input data given by the user and the results are printed out in graphical as well as tabular form.