Bestengineeringprojects.com-Structures of Cantilever Sheet Pile Wall
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Structures of Cantilever Sheet Pile Wallbestengineeringprojects.com /civil-projects/structures-of -cantilever-sheet-pile-walls/
Cantilever sheet piles are used where the height of the soil or water to be retained is smaller than4.5 m. The various f orces acting on a cantilever sheet pile wall are the active earth pressure onthe back of the wall and the passive earth pressure on the f ront of the wall. The active pressuretends the wall to move away f rom the backf ill while the passive earth pressure resists the wallmovement.
General Principle of Design of Structures of Cantilever Sheet Pile Wall
Figure 1 shown below illustrates the action of earth pressure against a cantilever sheet pile wall.The sheet pile is assumed as perf ectly rigid.
Under the action of a horizontal f orce, P applied at the top, the upper portion of the pile t ilts inthe direction of P and the lower moves opposite to the direction of the applied f orce P. This isshown by a dotted line in the f igure. Hence, the pile must have some rotation at certain posit ionnear the bottom. This point is shown as O in the Fig.1 (a). The pile above O is subjected to apassive earth pressure f rom the soil on its lef t side and active earth pressure in its right side,whereas the lower portion shown as is subjected to a passive earth pressure on the right sideand an active earth pressure on the lef t side.
At point O the pile does not move and the net earth pressure at the point will be nil. The net earthpressure is represented by the diagram abOc. The curve is replaced by a line dc f or the purpose
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of the design. The point d on the line af is so located that the sheet pile is in equilibrium underthe action of the f orce P and the earth pressures represented by areas ade and ecg. Theposition of the point d is obtained by trial and error.
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