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Retaining Wall Design

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Active and Passive Earth Pressure

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The forces exerted by soil on the retaining wall. Active earth pressure pushes against the wall, while passive earth pressure resists movement of the wall into the soil.

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Cantilever Retaining Wall

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A reinforced concrete wall that is fixed at its base and free at the top, designed to resist the earth pressure by bending.

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Gravity Retaining Wall

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A type of retaining wall that relies on its own weight to hold back earth pressure. It achieves stability through its mass.

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Weep Holes

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Small openings in a retaining wall that allow water to drain from the soil behind the wall, reducing hydrostatic pressure and preventing water buildup.

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Gabion Retaining Wall

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A flexible wall system made from steel wire mesh filled with stone or other suitable material, often used for slope stabilization and erosion control.

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Counterfort Retaining Wall

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A type of cantilever wall reinforced with counterforts attached to the back of the wall slab and base slab, designed to minimize bending moments.

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Backfill

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The material placed behind a retaining wall, which needs to have appropriate drainage characteristics to reduce hydrostatic pressure and prevent wall failure.

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Surcharge Load

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Any additional load placed on the ground surface behind a retaining wall, affecting the design by increasing the lateral earth pressure.

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Battering

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The intentional inclination of a retaining wall face towards the retained soil, designed to improve wall stability by utilizing gravity.

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Slope Stability

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The assessment of the potential for the retained soil to slough or slide, which is crucial for the safe design of retaining walls.

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Keying

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The process of embedding the base of a retaining wall into the ground to enhance sliding resistance and overall stability.

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Geogrid Reinforcement

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Geosynthetic material used to reinforce soil behind a retaining wall, increasing its stability and helping withstand lateral earth pressures.

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Footing

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The lower part of the wall that spreads the load over a broader area, providing support and reducing the chance of base failure due to overstressing the soil.

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Sheet Piling Retaining Wall

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A wall constructed by driving interlocking steel, wood, or vinyl sheets into the ground to provide earth retention and excavation support.

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Anchored Retaining Wall

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A wall that uses anchors or tiebacks implanted in the soil or rock behind it to provide additional support and resist lateral earth pressure.

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