OVERVIEW FOR DESIGN OF FOUNDATIONS ON EXPANSIVE SOILS
The design process for structures on expansive clay should consist of a feasibility study, preliminary design phase to establish the overall concept and a detailed design phase to complete the engineering description of the project. This report provides background information for establishing the preliminary design of structures in swelling soil areas based on field studies conducted by the U.S. Army Engineer Waterways Experiment Station (WES) and experiences of numerous investigators. The overview includes analyses of site and soil investigations, topography and landscaping including drainage and soil stabilization techniques, and selection of the foundation and superstructure. General suggestions for remedial repair of existing structures are also provided. Analysis of the movement of cast-in-place concrete piers in swelling soil are included to provide a basis for design of these foundations. Numerous structures constructed on expansive clay soil have experienced and sustained significant damage from differential heave and settlement. The types of structures most often damaged from heaving soil include highways, foundations and walls of residential and light commercial buildings, canal and reservoir linings, and retaining walls. The leading cause of foundation heave or settlement is change in soil mositure attributed to change in the field environment (e.g., climatic changes, prevention of evaporation beneath covered areas, improper drainage following construction and from usage requirements of the structure.
U.S. Army Waterways Experiment StationGeotechnical Laboratory, 3909 Halls Ferry Road
Vicksburg, MS USA 39180-6199
Department of the ArmyOffice of the Chief of Engineers
Washington, DC USA 20310
- Johnson, L D
- Publication Date: 1979-9
- Features: Appendices; Figures; References; Tables;
- Pagination: 108 p.
- TRT Terms: Cast in place structures; Concrete structures; Design; Drainage; Expansive clays; Feasibility analysis; Foundations; Motion; Piers (Supports); Piers (Wharves); Repairing; Soil stabilization; Soil tests; Topography
- Uncontrolled Terms: Repairs; Site investigation
- Old TRIS Terms: Foundations (Structures)
- Subject Areas: Design; Geotechnology; Highways; Hydraulics and Hydrology;
- Accession Number: 00307535
- Record Type: Publication
- Report/Paper Numbers: Misc Paper GL-79-21 Final Rpt.
- Contract Numbers: AT40 EO 004
- Files: TRIS, ATRI
- Created Date: Feb 11 1980 12:00AM