Dispersive Soil and its Influence on the Design of Reach 1A of the Tucson Aqueduct—Central Arizona Project

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by Richard L. McNearny, US Bureau of Reclamation, Denver, CO, USA,

Document Type: Proceeding Paper

Part of: Engineering Aspects of Soil Erosion, Dispersive Clays and Loess

Abstract: An extensive geotechnical field exploration and laboratory testing program was conducted because of dispersive and erosive soils along the alignment of the canal. The canal design was based on the need to utilize these soils in the earthen structures as well as to protect the lining of the canal from loss of support through piping of dispersive soil from the foundation into previous layers below. One design assumption was proven correct after a heavy rainfall on Reach 1B. Only operation of the canal will show if the remaining design assumptions are also correct.

Subject Headings: Foundation design | Canals | Soil settlement | Hydraulic design | Pipes | Linings | Soil loss | Laboratory tests | Arizona | North America | United States | Tucson

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