Cantilever Sheet Pile Wall Design

In a limit equilibrium analysis this type of wall is supported by a lateral earth pressure equal to the difference between the active and passive earth pressures above and below a point of rotation.

Cantilever sheet pile wall design.

Use factor of safety 1 5 for. Cantilever sheet piles are used where the height of the soil or water to be retained is smaller than 4 5 m. Figure 1 basic configuration with nomenclature of a cantilever sheet pile wall in a uniform soil in simple terms sheet piles are supported by the passive pressures below the dredge line offsetting either in overturning or sliding the active pressures on the earth side. A cantilever sheet pile wall consists of sheet piling driven deep enough into the ground to become a fixed vertical cantilever.

Cantilever walls offer an unbstructed open excavation. Design of cantilevered wall granular soil introduction. To take into account the friction between the wall and the soil we use friction angle δ φ 2. Please note this value is applied only for passive pressure.

The complex and iterative nature of embedded sheet pile wall calculations mean that this process cannot be completed by hand. The active pressure tends the wall to move away from the backfill while the passive earth pressure resists the wall movement. It is a quite simple tool to determine all the forces required for designing a sheet pile retaining wall and ideal for preliminary designs. It is based on the blum theory a limit equilibrium method lem.

A sheet pile wall is required to support a 12 excavation. In general the maximum excavation for a cantilever wall can reach up to 6m or 18ft. The civilweb cantilever sheet pile design excel spreadsheet is a powerful piece of design software which can be used to complete the calculations required for a sheet pile wall design in accordance with bs en 1997. A cantilevered sheet pile wall performs somewhat like a cantilevered beam.

The various forces acting on a cantilever sheet pile wall are the active earth pressure on the back of the wall and the passive earth pressure on the front of the wall. Of deepex on secant pile walls with our technical experts. Deeper cantilever walls have been constructed but these required more expensive wall systems such as t type diaphragm walls. Advantages of cantilever walls.

Because cantilever walls derive their support solely from the foundation soils they may be installed in relatively close proximity to existing structures. The sheet piling is driven to a sufficient depth into the ground to become fixed as a vertical can tilever resisting a load from active earth pressure. The soil is uniform as shown in the figure. It covers every aspect of sheet pile design including the soil mechanics and earth pressure theory involved in sheet pile design structural considerations design of both cantilever and anchored walls earthquake design for sheet pile walls seepage and hydrostatic loads anchor systems and tiebacks cofferdams corrosion and more.