Shear strength of surface soil as affected by soil bulk density and soil water content

Zhang, B, Zhao, QG, Horn, R and Baumgartl, T (2001) Shear strength of surface soil as affected by soil bulk density and soil water content. Soil & Tillage Research, 59 3-4: 97-106. doi:10.1016/S0167-1987(01)00163-5


Author Zhang, B
Zhao, QG
Horn, R
Baumgartl, T
Title Shear strength of surface soil as affected by soil bulk density and soil water content
Journal name Soil & Tillage Research   Check publisher's open access policy
ISSN 0167-1987
Publication date 2001
Sub-type Article (original research)
DOI 10.1016/S0167-1987(01)00163-5
Volume 59
Issue 3-4
Start page 97
End page 106
Total pages 10
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract This paper proposes a new method to measure the soil strength parameters at soil surface in order to explain the processes of soil erosion and sealing formation. To simulate the interlocks between aggregates or particles within top 2 mm of the soil, a piece of sandpaper 130 particles cm(-2)) was stuck on the bottom face of a plastic box of diameter of 6.8 cm with stiffening glue and used as shear media. The soil strength for the soils from sandy loam to clayey loam was measured with penetrometer and the new shear device at soil surface at different bulk density and soil water content. The normal stresses of 2, 5, 8, 10 and 20 hPa were applied for the new shear device. The results indicated that significant effect of bulk density on soil strength was detected in most casts though the difference in bulk density was small, ranging from 0.01 to 0.09 g cm(-3). It was also indicated that the measurement with the new shear device at soil surface was reproducible. The changes in soil shear strength parameters due to changes in bulk density and soil moisture were explainable with the Mohr-Coulomb's failure equation and the principles of the effective stress for the unsaturated soils. The implications of the method were later discussed. (C) 2001 Elsevier Science B.V. All rights reserved.
Keyword Soil Science
shear test at soil surface
shear strength parameters
penetrometer
Detachment
Splash
Flow
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Mined Land Rehabilitation Publications
 
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Created: Wed, 17 Oct 2007, 10:57:37 EST