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Performance of a Large Ribbed Mat on Cohesive Soil

by Lawrence D. Johnson, US Army Engineer Waterways, Experiment Station, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

The performance of a 678-ft by 304-ft (207-m by 93-m) ribbed concrete mat was studied to provide improved soil input parameters for design. The mat was constructed on a low plasticity fill overlying high plasticity (CH) clay shale. Observed movement patterns compare well with settlements calculated from a plate on an elastic foundation finite element program. Data from earth pressure cells and strain gages placed in one section of a stiffening beam are consistent with observed distortion patterns. This mat supports a flexible steel structure.

Subject Headings: Materials engineering | Soil strength | Steel structures | Mat foundations | Finite element method | Elastic foundations | Strain

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