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Some Practical Considerations in the Design of Deep Soil-Cement Mixing Applications

Some Practical Considerations in the Design of Deep Soil-Cement Mixing Applications. Demetrious C. Koutsoftas URS Corporation. Major Applications. 1. Excavations and Shoring 2. Ground Improvement/Lateral Spreading Barriers 3. Deep Foundations 4. Cut-off Walls.

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Some Practical Considerations in the Design of Deep Soil-Cement Mixing Applications

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  1. Some Practical Considerationsin the Design of DeepSoil-Cement Mixing Applications Demetrious C. Koutsoftas URS Corporation

  2. Major Applications 1. Excavations and Shoring 2. Ground Improvement/Lateral Spreading Barriers 3. Deep Foundations 4. Cut-off Walls

  3. Foundation Design Applications • 1. Soil-Cement Piles • Mobilization of Skin Friction • Lateral Stresses/Deformations • Grout Permeation • 2. Soil-Cement Cylindrical Shafts • Reinforcement • Lateral Support

  4. Cypress Freeway Project Depressed Roadway - 7th Street Realignment

  5. Soil Cement Uplift Pile

  6. Results of Uplift Load Tests on Soil-Cement Piles

  7. Soil-Cement Cylinder Piles

  8. View of Excavated Soil-Cement Shaft Exposed Soldier Piles at the Top of the Soil-Cement Cylinder Pile

  9. Lateral Support of Hand Excavated Caissons

  10. Excavations and Shoring • 1. Spacing of Soldier Piles and Behavior of Soil-Cement Between the Piles • 2. Special Applications with Jet-Grout Base Struts • Base Stability • Deformations • Anchorage • Wall Embedment

  11. Typical Arrangement of Soldier Pilesfor Shoring Wall Construction

  12. Excavation for EBMUD Storage Basin

  13. Typical Example of Soil-Cement Walls: Exposed Columns After Excavation

  14. Arrangement of Soil-Cement Columnsfor Increased Soldier Pile Spacing

  15. View of Completed Excavation with Soldier Piles Spaced 6 Feet Apart

  16. Islais Creek Area and Excavation Projects

  17. Comparison of Conventional “Stiff” Systemwith New Shoring Concept

  18. Base Stability ConsiderationsUse of Jet Grout Slab Anchored with Piles

  19. Results of Pull-out Tests for Bond Resistance Determination: Zero, Four, and Six Rows of Shear Keys

  20. (b) Inclinometer No. N-76;Overflow Structure (a) Inclinometer No. E-155;Indiana Street Segment Lateral Deformations Caused by Jet Grouting

  21. Lateral Deformations Caused by Jet Grouting:Inclinometer No. S-93; Overflow Structure

  22. Islais Creek Contract ETunnel Access Shaft Design

  23. (a) Inclinometer No. E-87;Indiana Street Segment (b) Inclinometer No. N-120; Overflow Structure Lateral Deformations Caused by Jet Grouting

  24. View of Completed Excavation

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