01025459

Component

https://doi.org/10.3141/1975-13

http://scholar.google.com...baha&publication_year=2006

The controlled modulus columns (CMC) foundation is one technique of ground modification for support of light structures such as highway and railway embankments. In this technique, a specially designed auger, powered by equipment with large torque capacity and high static down thrust, displaces the soil laterally without vibration. During the auger extraction process, a column is developed by pressure grouting to achieve a predetermined stiffness ratio with the surrounding soil. Because of the combined effect of densification and reinforcement, the properties of soft soil are improved because of composite action. The design and monitoring of a column-supported embankment project are presented; 2,193 CMC columns were installed up to a depth of 12.5 m to control settlement. The main challenges were construction on soft ground and the need for an accelerated construction technology for timely delivery of the project. Various alternatives, stability analysis, design considerations, construction challenges, quality control, and monitoring system were evaluated.

01039137

English

pp 96-103

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099846

Print

Figures (10) ; Photos (4) ; References (5) ; Tables (2)

Augers; Columns; Design; Embankment foundations; Monitoring; Soft soils; Stiffness

Controlled modulus columns; Pressure grouting

Design; Geotechnology; Highways; I42: Soil Mechanics

PRP, TRIS, TRB, ATRI

Mar 3 2006 10:46AM

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• Base Reinforcement with Biaxial Geogrid: Long-Term Performance
• COM624P-Based Drilled Shaft Torque and Lateral Load Analysis Method
• Comparison of Field and Laboratory Pullout Tests on Geosynthetics in Marginal Soils
• Construction-Induced Stresses in H-Piles Supporting an Integral Abutment Bridge
• Deflection of Prototype Geosynthetic-Reinforced Working Platforms over Soft Subgrade
• Deformation–Resistance Model for Geogrid-Reinforced Unpaved Road
• Durability of Galvanized Soil Reinforcement: More Than 30 Years of Experience with Mechanically Stabilized Earth
• Evaluation of Full-Sized Cast-in-Place Pile Capacity with Artificial Defects
• Horizontal Bearing Capacity of Suction Piles in Sand
• Influence of Soil Strength on Optimal Embedment Depth of Geosynthetic Reinforcement Layer in Granular-Reinforced Foundations
• Intelligent Soil Compaction Technology: Results and a Roadmap Toward Widespread Use
• Numerical Simulation of Dynamic Behavior of Geofoam Embankment
• Reuse of Fly-Ash Amended Petroleum-Contaminated Soils in Highway Embankments
• Sustainable Earthworks Specifications for Transport Infrastructure
• Visual Rating and Strength Testing of 40-Year-Old Precast Prestressed Concrete Bridge Piling