Chapter
Jul 6, 2017
Design and Construction of Column Supported Embankment Using Deep Soil Mixing Columns and Reinforced Concrete Load Transfer Slab
Authors: King H. Chin, M.ASCE [email protected], Heidi P. Cashman, M.ASCE [email protected], and Chris Barnes [email protected]Author Affiliations
Publication: Grouting 2017
Abstract
This paper presents the design and construction of an embankment supported on a reinforced concrete load transfer slab founded on deep-soil-mixing columns completed as part of the seismic upgrade of the Airport Way South Viaduct project in Seattle, Washington. The project included replacement of the timber trestle approach structures constructed in 1928 with mechanically stabilized earth (MSE) approach embankments. Ground improvement was incorporated in the design to mitigate compressible/liquefiable soil conditions within the new MSE approaches. Both the limit equilibrium methods and 3D numerical modeling were used to evaluate the performance of the new embankments and to ensure strain compatibility between the soils and the DSM columns. By including the reinforced concrete load transfer slab in the analysis, the amount of DSM columns and ground improvement in the original design were significantly reduced. Settlement monitoring was completed throughout the construction and confirmed that the specified performance criterion was met.
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© 2017 American Society of Civil Engineers.
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Published online: Jul 6, 2017
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P.E.
GeoEngineers, Inc., 8410 154th Ave. NE, Redmond, WA 98052. E-mail: [email protected]
P.E.
GeoEngineers, Inc., 8410 154th Ave. NE, Redmond, WA 98052. E-mail: [email protected]
City of Seattle Department of Transportation, P.O. Box 34996, Seattle, WA 98124. E-mail: [email protected]
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