Channels Stability in Undisturbed Cohesive Soils
This article has a reply.
VIEW THE REPLYThis article has a reply.
VIEW THE REPLYThis article has a reply.
VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 89, Issue 2
Abstract
The erosion resistance of cohesive soils is defined by a comparison of shear strength tests with field observations under specific flow conditions. Samples are obtained by pushing 1.9 in.-by-4 in., thin-walled tubes into undisturbed soils along channel boundaries. Coefficients of permeability are obtained. While still saturated, unconfined compression strength tests are made. Field observations and tests showed that the degree of erosion resistance and shear strength are positively related. Dry density, plasticity index, and percentage of soil finer than 5 microns show a moderate to high correlation with shear strength, individually and in multiple regression analysis, but fail to explain a majority of the variations. Permeability is better related with the coefficient of correlation r = -0.78. This variable also reflects the condition that slowly permeable cohesive soils that lose strength by saturation are better able to resist erosion from long duration flows. Shear stresses are symbolized by the product of channel slope, hydraulic radius, specific weight of water, and average velocity, and termed tractive power. This product and the unconfined compressive strength are used to define the boundary between channels that are observed to be stable or eroding.
Get full access to this article
View all available purchase options and get full access to this article.
Information & Authors
Information
Published In
Journal of the Hydraulics Division
Volume 89 • Issue 2 • March 1963
Pages: 87 - 96
Copyright
© 1963 American Society of Civil Engineers.
History
Published in print: Mar 1963
Published online: Feb 3, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.