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Cantilever sheet pile walls: |
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Fig. 6.6.Cantilever sheet pile wall |
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Cantilever sheet piles are further divide into two types: |
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Free cantilever sheet pile |
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It is a sheet pile subjected to a concentrated horizontal load at its top. There is no back fill above the dredge level. The free cantilever sheet pile derives its stability entirely from the lateral passive resistance of the soil below the dredge level into which it is driven. |
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Cantilever Sheet Pile Wall with Backfill |
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A cantilever sheet pile retains backfill at a higher level on one side. The stability is entirely from the lateral passive resistance of the soil into which the sheet pile is driven, like that of a free cantilever sheet pile. |
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Anchored sheet pile walls |
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Anchored shet pile walls are held above the driven depth by anchors provided ata suitable level. The anchors provided for the stability of the sheet ile , in addition tomthe lateral passive resistance of the soil into which the shet piles are driven. The anchored sheet piles are also of two types. |
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Fig. 6.7.Anchored sheet pile wall |
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Free earth support piles. |
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An anchored pile is said to have free earth support when the depth of embedment is small and the pile rotates at its bottom tip. Thus there is a point of contraflexure in the pile. |
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Fixed earth support piles. |
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An anchored sheet pile has fixed earth support when the depth of embedment is large. The bottom tip of the pile is fixed against rotations. There is a change in the curvature of the pile, and hence, an inflection point occurs. |
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