FDOT Standard Plans Index 455-400: Precast Concrete Sheet Pile Wall (Conventional)

Design Criteria

Design Criteria AASHTO LRFD Bridge Design Specifications ; Structures Design Guidelines ( SDG )

Design Assumptions and Limitations

Design Assumptions and Limitations These piles are typically jetted into place rather than driven like a bearing pile. If shallow rock formations exist within the wall limits, other wall types must be considered. A cast-in-place reinforced concrete bulkhead cap is required to structurally tie the tops of the concrete sheet piles together and to provide corrosion protection for the reinforcing and prestressing steel that extend from the tops of the piles.

These piles can be used for cantilevered walls or tied-back walls. Project specific designs and details are required for tie-backs. If the length of piles required for a cantilevered wall exceeds the limits shown on the standard drawings, consider using tie - backs.

These piles can be used in all environments with the appropriate concrete admixtures. The grouted keyway used in combination with geotextile (the limits of both are defined by dimension "X") are assumed to not be watertight. Thus they contain the soil behind the wall while still allowing groundwater behind the wall to weep through.

No other separate weep holes are generally required. The bottom of the "X" dimension is required to be 1'-8" below the mud line. The tip elevation of piles shall be determined by the Geotechnical Engineer.

WALL THICKNESS STRAND DIA. (in.) SECTION MODULUS (in 3 ) STRESS * (psi) T=10 in. 0.5 500 1150 T=10 in.

0.6 500 1160 T=12 in. 0.5 720 1100 T=12 in. 0.6 720 1160 * Unit Prestress after losses See additional information on the Standard.

General Notes

General Notes Sheet, specify the concrete class for the cast-in-place cap in accordance with the retaining wall environment classification. See SDG 1.4. Figure 1 Typical Cap Details Complete the following "Concrete Sheet Pile Wall with Prestressed Soil Anchors Data Table", "Concrete Sheet Pile Wall with Dead Man Anchors Data Table" or "Concrete Sheet Pile Wall, Cantilever Data Table" as applicable and include it on the supplemental sheets.

Complete the Notes and add/modify/delete as necessary. See FDM 115 for more information regarding use of Data Tables. Index 455-400 Precast Concrete Sheet Pile Wall (Conventional) Index 455-400 Precast Concrete Sheet Pile Wall (Conventional) Index 455-400 Precast Concrete Sheet Pile Wall (Conventional) Index 455-400 Precast Concrete Sheet Pile Wall (Conventional)

Payment

Payment Item number Item Description Unit Measure 400-2-8 Concrete Class II, Bulkhead CY 400-3-8 Concrete Class III, Bulkhead CY 400-4-8 Concrete Class IV, Bulkhead CY 415-1-8 Reinforcing Steel - Bulkhead LB 415-2-8 Reinforcing Steel - Stainless, Bulkhead LB 451-70-AA Prestressed Soil Anchor EA 455-14-AA Concrete Sheet Piling LF 455-87 Anchor Bar, Steel EA See the BOE and Specifications for additional information on payment, pay item use and compensation.

What your plans must show

Plan Content Requirements for this index — the SPI's checklist for designers.

• In the Structures or Roadway Plans: Index 455-400 Precast Concrete Sheet Pile Wall (Conventional) Prepare Wall Control Drawings and related drawings as specified in SDM Chapter 19 and FDM 262, and include them in the plans. Use combinations of straight and corner piles to accommodate project specific geometric requirements. Show one Starter Pile location for a given wall. In the Elevation View, show the wall construction sequence proceeding away from the Starter Pile by locating the 11" by 11" corner clip on each Typical Pile on the side farthest away from the Starter Pile. Consider necessary tie-ins with adjacent structures and other boundary restrictions when selecting the Starter Pile location. Prepare project specific cast-in-place concrete bulkhead cap, tie-back and utility accommodation details and include them in the plans. See Figure 1 for typical cap details. In the