7/16/01 sv..\99-00020043\cal trans\final presentation.ppt some practical considerations in the...

$: 7/16/01 sv..\99-00020043\cal trans\final presentation.ppt Some Practical Considerations in the Design of Deep Soil-Cement Mixing Applications Demetrious$
7/16/01 sv ..\99-00020043\cal trans\final presentation.ppt

Some Practical Considerationsin 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


Foundation Design Applications

1. Soil-Cement Piles• Mobilization of Skin Friction• Lateral Stresses/Deformations• Grout Permeation

2. Soil-Cement Cylindrical Shafts• Reinforcement• Lateral Support


Cypress Freeway ProjectDepressed Roadway - 7th Street Realignment


Soil Cement Uplift Pile


Results of Uplift Load Tests on Soil-Cement Piles


Soil-Cement Cylinder Piles


Exposed Soldier Piles at the Topof the Soil-Cement Cylinder Pile

View of ExcavatedSoil-Cement Shaft


Lateral Support of Hand Excavated Caissons


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

Excavations and Shoring


Typical Arrangement of Soldier Pilesfor Shoring Wall Construction


Excavation for EBMUD Storage Basin


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


Arrangement of Soil-Cement Columnsfor Increased Soldier Pile Spacing


View of Completed Excavation with Soldier

Piles Spaced 6 Feet Apart


Islais Creek Area and Excavation Projects


Comparison of Conventional “Stiff” Systemwith New Shoring Concept


Base Stability ConsiderationsUse of Jet Grout Slab Anchored with Piles


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


(b) Inclinometer No. N-76;Overflow Structure

(a) Inclinometer No. E-155;Indiana Street Segment

Lateral Deformations Caused by Jet Grouting


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


Islais Creek Contract ETunnel Access Shaft Design


(a) Inclinometer No. E-87;Indiana Street Segment

(b) Inclinometer No. N-120; Overflow Structure

Lateral Deformations Caused by Jet Grouting


View of Completed Excavation

7/16/01 sv..\99-00020043\cal trans\final presentation.ppt some practical considerations in the...

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