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Tract B ofthe Villa Alegre Development

We recommend that the following equivalent fluid pressures be utilized for design of retaining walls:

Loading Condition Active Earth Pressure Passive Earth Pressure

Equivalent Fluid Pressure* 32 pcf

Undisturbed Natura Structural Fill Earth Pressure at Rest

l Soils

300 pcf 400 pcf 60 pcf

  • *

    Does not include a factor of safety or hydrostatic pressure.

The above earth pressures do not include a factor of safety or hydrostatic pressure. If retaining walls are restrained against rotation (corners of basements, upper floors, etc.) the earth pressure at rest should be utilized for design.

Lateral retaining wall loads will be resisted by passive earth pressure at the toe and friction along the base ofthe wall. A coefficient of friction between soil and concrete of0.4 may be used for design.

Backfill adjacent to retaining walls should be placed and compacted as detailed in the attached Appendix. Backfill adjacent to walls should be compacted with relatively light, hand-operated equipment to prevent overstressing the wall and excessive lateral deflections.

V & A Project No.: 09-1-102

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