7/16/01 sv..\99-00020043\cal trans\final presentation.ppt some practical considerations in the...
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Some Practical Considerationsin the Design of Deep
Soil-Cement Mixing Applications
Demetrious C. Koutsoftas
URS Corporation
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Major Applications
1. Excavations and Shoring
2. Ground Improvement/Lateral Spreading Barriers
3. Deep Foundations
4. Cut-off Walls
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Foundation Design Applications
1. Soil-Cement Piles• Mobilization of Skin Friction• Lateral Stresses/Deformations• Grout Permeation
2. Soil-Cement Cylindrical Shafts• Reinforcement• Lateral Support
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Cypress Freeway ProjectDepressed Roadway - 7th Street Realignment
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Soil Cement Uplift Pile
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Results of Uplift Load Tests on Soil-Cement Piles
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Soil-Cement Cylinder Piles
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Exposed Soldier Piles at the Topof the Soil-Cement Cylinder Pile
View of ExcavatedSoil-Cement Shaft
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Lateral Support of Hand Excavated Caissons
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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
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Typical Arrangement of Soldier Pilesfor Shoring Wall Construction
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Excavation for EBMUD Storage Basin
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Typical Example of Soil-Cement Walls:Exposed Columns After Excavation
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Arrangement of Soil-Cement Columnsfor Increased Soldier Pile Spacing
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View of Completed Excavation with Soldier
Piles Spaced 6 Feet Apart
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Islais Creek Area and Excavation Projects
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Comparison of Conventional “Stiff” Systemwith New Shoring Concept
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Base Stability ConsiderationsUse of Jet Grout Slab Anchored with Piles
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Results of Pull-out Tests for Bond Resistance Determination: Zero, Four, and Six Rows of Shear Keys
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(b) Inclinometer No. N-76;Overflow Structure
(a) Inclinometer No. E-155;Indiana Street Segment
Lateral Deformations Caused by Jet Grouting
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Lateral Deformations Caused by Jet Grouting:Inclinometer No. S-93; Overflow Structure
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Islais Creek Contract ETunnel Access Shaft Design
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(a) Inclinometer No. E-87;Indiana Street Segment
(b) Inclinometer No. N-120; Overflow Structure
Lateral Deformations Caused by Jet Grouting
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View of Completed Excavation