Rock riprap design for protection of stream channels near highway structures; Volume 2, Evaluation of Riprap design procedures
Water-Resources Investigations Report
86-4128
By: J. C. Blodgett and C.E. McConaughy
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Abstract
In volume 2, seven procedures now being used for design of rock riprap installations were evaluated using data from 26 field sites. Four basic types of riprap failures were identified: Particle erosion, translational slide, modified slump, and slump. Factors associated with riprap failure include stone size , bank side slope, size gradation, thickness, insufficient toe or endwall, failure of the bank material, overtopping during floods, and geomorphic changes in the channel. A review of field data and the design procedures suggests that estimates of hydraulic forces acting on the boundary based on flow velocity rather than shear stress are more reliable. Several adjustments for local conditions, such as channel curvature, superelevation, or boundary roughness, may be unwarranted in view of the difficulty in estimating critical hydraulic forces for which the riprap is to be designed. Success of the riprap is related not only to the appropriate procedure for selecting stone size, but also to the reliability of estimated hydraulic and channel factors applicable to the site. (See also W89-04910) (Author 's abstract)
Suggested Citation
Blodgett, J.C., McConaughy, C., 1986, Rock riprap design for protection of stream channels near highway structures; Volume 2, Evaluation of Riprap design procedures: U.S. Geological Survey Water-Resources Investigations Report 86-4128, viii, 95 p. :ill. ;28 cm., https://doi.org/10.3133/wri864128.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Rock riprap design for protection of stream channels near highway structures; Volume 2, Evaluation of Riprap design procedures |
| Series title | Water-Resources Investigations Report |
| Series number | 86-4128 |
| DOI | 10.3133/wri864128 |
| Year Published | 1986 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | viii, 95 p. :ill. ;28 cm. |