Cantilever Sheet Pile Wall Analysis

10ft excavation cantilever sheet pile wall.

Cantilever sheet pile wall analysis.

The depth of sheetpiling walls below thebottom of the excavation are determined by using the difference between the passive and active pressures acting on the wall. A cantilevered sheet pile wall performs somewhat like a cantilevered beam. Of deepex on secant pile walls with our technical experts. In general the maximum excavation for a cantilever wall can reach up to 6m or 18ft.

Determine d 1 2 to 1 3 d. This method of applying the factor of safety is explained in sheet pile design by pile buck. φ 30 γ 109 2 pcf. Analysis cantilever sheet pile walls select a point o arbitrary calculate the active and passive earth pressures.

For this purpose one needs to know the lateral earth pressure theoryfirst. In this example we will design a cantilever sheet pile wall supporting a 10 ft excavation. It describes typical applications for cantilever sheet pile wall in stream restoration and stabilization projects types of sheet pile material loads applied to the sheet pile failure modes design for cantilever wall stability structural design of the piles and some construction considerations. We need to find the penetration below the dredge line d and the maximum moment on the sheeting.

Variation of net pressure diagram and variation of moment versus depth of a cantilevered sheet pile wall is shown below. Deeper cantilever walls have been constructed but these required more expensive wall systems such as t type diaphragm walls. Dry cantilever wall uniform cohesionless soil level backfill rankine conditions. 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.

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. Advantages of cantilever walls. H 10 passive reduction for the factor of safety 1 5. The model and analysis have been designed with deepex shoring design software.

A cantilever sheet pile wall consists of sheet piling driven deep enough into the ground to become a fixed vertical cantilever. Determine the depth do by summing moments about o. The model used in this excavation analysis contains three types of elements solid quadrilateral elements for the soil domain displacement based beam elements for the sheet pile wall and beam contact elements to define the frictional wall soil interface. The objective in analysis of sheet pile walls is to get to a depth of embedment d sufficient for the wall stability.