A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Compacted Loessial-Soil Canal Linings
The performance of compacted-soil canal linings has been of concern in severe climates where factors such as freezing and thawing action could conceivably reduce soil density and lessen the effectiveness of the lining as a water barrier. As a part of its lower-cost canal lining program, the Bureau of Reclamation, United States Department of the Interior (USBR), has a long-range research plan to determine changes in soil properties of canal linings and the corresponding seepage characteristics.
The results are presented of significant field and laboratory tests obtained to date (1962) on loessial-type soil of compacted linings located in south-central Nebraska. Tests on many soil types in soil linings have shown that the loessial-type soils generally are the most apt to be affected by freezing and thawing. The tests include field density, field seepage by the ponding method, laboratory compaction, Atterberg limits, gradation, permeability, and freeze-thaw.
The results indicate that there is some density decrease in soil linings of this type of soil, the decrease varying inversely with the depth of lining. This is confirmed by a laboratory freeze-thaw test program on project soil specimens subjected to loads from zero to 2.0 psi.
Permeability tests on the freeze-thaw specimens indicate that the rate of permeability increases more rapidly as the density becomes less than 90% of the Proctor maximum density, particularly for the less plastic soils. The field seepage tests showed that, although there has been some density decrease in the compacted-soil lining, the lining was still effective in reducing seepage to allowable limits.
Compacted Loessial-Soil Canal Linings
The performance of compacted-soil canal linings has been of concern in severe climates where factors such as freezing and thawing action could conceivably reduce soil density and lessen the effectiveness of the lining as a water barrier. As a part of its lower-cost canal lining program, the Bureau of Reclamation, United States Department of the Interior (USBR), has a long-range research plan to determine changes in soil properties of canal linings and the corresponding seepage characteristics.
The results are presented of significant field and laboratory tests obtained to date (1962) on loessial-type soil of compacted linings located in south-central Nebraska. Tests on many soil types in soil linings have shown that the loessial-type soils generally are the most apt to be affected by freezing and thawing. The tests include field density, field seepage by the ponding method, laboratory compaction, Atterberg limits, gradation, permeability, and freeze-thaw.
The results indicate that there is some density decrease in soil linings of this type of soil, the decrease varying inversely with the depth of lining. This is confirmed by a laboratory freeze-thaw test program on project soil specimens subjected to loads from zero to 2.0 psi.
Permeability tests on the freeze-thaw specimens indicate that the rate of permeability increases more rapidly as the density becomes less than 90% of the Proctor maximum density, particularly for the less plastic soils. The field seepage tests showed that, although there has been some density decrease in the compacted-soil lining, the lining was still effective in reducing seepage to allowable limits.
Compacted Loessial-Soil Canal Linings
Jones, Chester W. (author) / Lowitz, C. A. (author)
Transactions of the American Society of Civil Engineers ; 128 ; 349-370
2021-01-01
221963-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Compacted loessial-soil canal linings
| Engineering Index Backfile | 1962
Compressibility and collapsibility of compacted unsaturated loessial soils
| British Library Conference Proceedings | 1995
| Online Contents | 1966
Engineering Index Backfile | 1935
| Engineering Index Backfile | 1947