00471828

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http://onlinepubs.trb.org...trr/1986/1089/1089-004.pdf

https://scholar.google.co...puis&publication_year=1986

Water erosion of cohesive soils is a complex phenomenon that includes different processes. A classification of erosion processes is proposed and examples are given in relation to highway construction. In the case of the scour resistance of solid clays, available prediction methods proposed relatioships between physical or mechanical parameters and the critical hydraulic shear stress that defines a boundary between erosion and no erosion, whereas erosion rates usually are not estimated. These methods have been questioned because it appears that the physicochemical parameters of both the clay and the eroding water control the erosion process. Subsequent research on these parameters has yet to yield reliable predictions based on indirect measurements. Consequently, it is deemed necessary to test the clay and eroding water for each case. In order to study the erodibility of solid cohesive soils, a rotational erosion device has been improved. Either intact or remolded samples can be tested, physicochemical parameters can be controlled, and the hydraulic shear stress and the erosion rate can be adequately determined. A relatively complete and accurate graph of erosion rate versus hydraulic shear stress, including erosion rate-values for hydraulic shear stress-values lower than critical, can be established. The influence of water quality or of any stabilizing treatment of the cohesive soil may be quantitatively analyzed.

Publication of this paper sponsored by Committee on Environmental Factors Except Frost.Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01418818

pp 23-28

1986

Transportation Research Record

0309041090

Print

Figures (6) ; References (29)

Clay soils; Cohesive soils; Erosion; Hydraulics; Measuring instruments; Scour; Shear stress

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Jul 31 1988 12:00AM

• ANALYSIS OF SLOPE FAILURE IN OVERCONSOLIDATED FISSURED RESIDUAL SOILS: A CASE STUDY
• COMPRESSIBILITY OF COMPACTED FILLS EVALUATED BY THE DILATOMETER
• CONSTRUCTION METHODS TO CONTROL EXPANSIVE SOILS IN SOUTH DAKOTA
• CONTROL OF FROST PENETRATION IN ROAD SHOULDERS WITH INSULATION BOARDS
• DEFORMATION ANALYSES OF FLORIDA HIGHWAY SUBGRADE SAND SUBJECTED TO REPEATED LOAD TRIAXIAL TESTS
• DETERMINATION OF THE CRITICAL THAW-WEAKENED PERIOD IN ASPHALT PAVEMENT STRUCTURES
• DRAINED-STRENGTH PARAMETERS FROM DIRECT SHEAR TESTS FOR SLOPE STABILITY ANALYSES IN OVERCONSOLIDATED FISSURED RESIDUAL SOILS
• DYNAMIC COMPACTION OF LOOSE AND HYDROCOMPACTIBLE SOILS ON INTERSTATE 90, WHITEHALL-CARDWELL, MONTANA
• EXPERIMENTAL ASPECTS OF MERCURY INTRUSION POROSIMETRY
• FACTORS IMPORTANT TO THE DEVELOPMENT OF FROST HEAVE SUSCEPTIBILITY CRITERIA FOR COARSE-GRAINED SOILS
• FLEXURAL FATIGUE STRENGTH OF LIME-LATERITE SOIL MIXTURES
• FROST ACTION PREDICTIVE TECHNIQUES: AN OVERVIEW OF RESEARCH RESULTS
• GENESIS AND DISTRIBUTION OF COLLUVIUM IN BUFFALO CREEK AREA, MARION COUNTY, WEST VIRGINIA
• LOCATING SUBSURFACE GRAVEL WITH THERMAL IMAGERY: PRELIMINARY RESULTS
• MEASUREMENT OF PORE-SIZE DENSITY FUNCTION IN SAND
• PERFORMANCE OF CEMENT-MODIFIED SOILS: A FOLLOW-UP REPORT
• PHYSICAL PROPERTIES OF SOUTHEASTERN WASHINGTON LOESS RELATED TO CUT SLOPE DESIGN
• SATURATION EFFECTS ON CALCAREOUS DESERT SANDS
• THE PRESSUREMETER IN GEOTECHNICAL PRACTICE
• THE SHERMAN LANDSLIDE: A CASE HISTORY