Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

The construction of roadway embankments over soft, compressible soils challenges designers with managing large and differential settlements, maintaining embankment stability, and minimizing construction costs associated with long consolidation periods. These challenges can be successfully tackled with the use of an in-situ soil improvement technique such as the Column Supported Embankment (CSE). The Column Supported Embankment involves constructing a pattern of cement-grouted columns in-situ, using the vibro-displacement or displacement-auger technique. The columns are constructed to bear on dense sand strata underlying cohesive strata that would otherwise consolidate under the embankment loading. A load transfer platform (LTP) is used to effectively distribute the embankment loads onto the series of cement-grouted columns. This paper presents a project case history involving the planning and construction of Column Supported Embankments for the proposed widening of New Jersey’s Garden State Parkway over Bass River. The soil improvement solution called Column Supported Embankment (CSE) is presented. In addition, a comparison of different Column installation techniques such as Controlled Modulus Columns (CMC) and Vibro Concrete Shaft (VCS)/Vibro Concrete column (VCC) is presented. The results of static load tests performed on sacrificial columns and data obtained from instrumentation installed during construction to assess performance of CSE are also presented. The performance of the Column Supported Embankment system is assessed for each system with different installation techniques for the columns and Load Transfer Platforms with either geogrid or geotextile from similar installations in different projects. Finally, conclusions are presented regarding the design and construction aspects of the Column Supported Embankment.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 4th, 12:00 AM

Embankment Construction Using Column Supported Embankment

Chicago, Illinois

The construction of roadway embankments over soft, compressible soils challenges designers with managing large and differential settlements, maintaining embankment stability, and minimizing construction costs associated with long consolidation periods. These challenges can be successfully tackled with the use of an in-situ soil improvement technique such as the Column Supported Embankment (CSE). The Column Supported Embankment involves constructing a pattern of cement-grouted columns in-situ, using the vibro-displacement or displacement-auger technique. The columns are constructed to bear on dense sand strata underlying cohesive strata that would otherwise consolidate under the embankment loading. A load transfer platform (LTP) is used to effectively distribute the embankment loads onto the series of cement-grouted columns. This paper presents a project case history involving the planning and construction of Column Supported Embankments for the proposed widening of New Jersey’s Garden State Parkway over Bass River. The soil improvement solution called Column Supported Embankment (CSE) is presented. In addition, a comparison of different Column installation techniques such as Controlled Modulus Columns (CMC) and Vibro Concrete Shaft (VCS)/Vibro Concrete column (VCC) is presented. The results of static load tests performed on sacrificial columns and data obtained from instrumentation installed during construction to assess performance of CSE are also presented. The performance of the Column Supported Embankment system is assessed for each system with different installation techniques for the columns and Load Transfer Platforms with either geogrid or geotextile from similar installations in different projects. Finally, conclusions are presented regarding the design and construction aspects of the Column Supported Embankment.